Sensor module, shah optical system, and electronic device

Abstract

The application relates to the technical field of optics, in particular to a sensor module, a Schlieren optical system and electronic equipment. The application aims to solve the technical problem that the imaging plane of a Schlieren lens is inclined relative to the optical axis, resulting in geometric aberration of imaging and affecting the imaging quality. The sensor module of the application is provided with a light wedge on the light-sensing surface side of a light-sensing chip, and object-side light rays are imaged on the light-sensing chip via the light wedge. The light wedge has a preset included angle between the entrance surface and the exit surface. After the refraction of the light rays via the light wedge, the optical path difference between the meridional light beams and the sagittal light beams in the light rays is reduced, the distance between the convergence points of the meridional light beams and the convergence points of the sagittal light beams is reduced, the geometric aberration caused by the inclined imaging light-sensing surface is reduced, the imaging quality of the Schlieren optical system is improved, and the detection precision of the Schlieren optical system is further improved. Moreover, the light wedge replaces the existing light-transmitting cover plate and also plays a role in protecting the light-sensing chip.

Description

Technical Field

[0001] This application relates to the field of optical technology, and in particular to a sensor module, a SAM optical system, and electronic equipment. Background Technology

[0002] With the development of image processing and computer technology, machine vision technology has advantages such as high precision, high speed, and high stability, and is therefore widely used.

[0003] SAM lenses can achieve clear imaging of tilted targets across a wide field of view, increasing the clear imaging range and improving measurement accuracy in industrial measurements. However, the tilt of the imaging plane relative to the optical axis in SAM lenses causes geometric aberrations in the imaging, affecting image quality. Summary of the Invention

[0004] This application provides a sensor module, a SAM optical system, and an electronic device to solve the technical problem that geometric aberrations caused by the tilt of the imaging plane of the SAM lens relative to the optical axis affect the imaging quality.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0006] The first aspect of this application provides a sensor module for use in a SAM optical path, comprising: an optical wedge and a photosensitive chip, wherein the optical wedge is encapsulated on one side of the photosensitive surface of the photosensitive chip, and light is imaged onto the photosensitive surface of the photosensitive chip via the optical wedge; the incident surface and the exit surface of the optical wedge are both planar, and there is a preset angle between the incident surface and the exit surface of the optical wedge.

[0007] The sensor module of this application features an optical wedge on one side of the photosensitive surface of the photosensitive chip. Object-side light is imaged onto the photosensitive chip via the optical wedge. A preset angle exists between the incident and exit surfaces of the optical wedge. After refraction by the optical wedge, the optical path difference between the meridional and sagittal beams in the light rays is reduced, thus decreasing the distance between the convergence points of the meridional and sagittal beams. This reduces the geometric aberrations caused by the tilted imaging photosensitive surface, improving the imaging quality of the SAM optical system and consequently enhancing its detection accuracy. Furthermore, the optical wedge, replacing the existing light-transmitting cover, also protects the photosensitive chip.

[0008] As an improvement to the sensor module described above in this application, one of the incident surface and the exit surface of the optical wedge is perpendicular to the optical axis of the Sham optical path, and the preset angle A1 between the incident surface and the exit surface of the optical wedge satisfies 0°<A1≤2°.

[0009] As an improvement to the sensor module described above in this application, the distance between the incident surface and the exit surface of the optical wedge is the thickness of the optical wedge, and the thickness of the optical wedge gradually increases or decreases along a preset direction; multiple optical wedges are provided, and the multiple optical wedges are arranged sequentially along the optical axis of the Sham optical path, and the multiple optical wedges have the same refractive index; the sum of the thicknesses of the multiple optical wedges gradually increases or decreases along the preset direction.

[0010] As an improvement to the sensor module described in this application, multiple optical wedges are provided, and the multiple optical wedges are arranged sequentially along the optical axis of the Sham optical path. The refractive index of at least one optical wedge is different from that of the other optical wedges, so that the dv of the meridional component and the sagittal component of the contrast of each field of view MTF at 110 lp / mm satisfies 0 ≤ dv ≤ 0.1.

[0011] A second aspect of this application provides a SAM optical system, comprising a SAM lens and an optical wedge arranged sequentially from the object side to the image side along the optical axis; object-side light rays pass sequentially through the SAM lens and the optical wedge; the incident surface and the exit surface of the optical wedge are both planar, and there is a preset angle between the incident surface and the exit surface of the optical wedge.

[0012] Compared with the prior art, the Sham optical system provided in the third aspect of this application has the following advantages:

[0013] The SAM optical system provided in this application includes a SAM lens and an optical wedge arranged sequentially from the object side to the image side along the optical axis. The object-side light rays pass through the SAM lens and the optical wedge in sequence. After the light rays are refracted by the optical wedge, the optical path difference between the meridional beam and the sagittal beam in the light rays is reduced, which reduces the distance between the convergence point of the meridional beam and the convergence point of the sagittal beam. This reduces the geometric aberrations caused by the tilted imaging photosensitive surface, improves the imaging quality of the SAM optical system, and thus improves the detection accuracy of the SAM optical system.

[0014] As an improvement to the SAM optical system described in this application, the optical wedge is encapsulated on the light-emitting side of the SAM lens; or, the SAM optical system further includes a photosensitive chip, with object-side light passing sequentially through the SAM lens and the optical wedge to image onto the photosensitive chip; the optical wedge is encapsulated on the light-incident side of the photosensitive chip, and the optical wedge and the photosensitive chip form an image sensor.

[0015] As an improvement to the Sham optical system described in this application, one of the incident surface and the exit surface of the optical wedge is perpendicular to the optical axis, and the preset angle A1 between the incident surface and the exit surface of the optical wedge satisfies 0°<A1≤2°.

[0016] As an improvement to the Sham optical system described in this application, the distance between the incident surface and the exit surface of the optical wedge is the thickness of the optical wedge, and the thickness of the optical wedge gradually increases or decreases along a preset direction; multiple optical wedges are provided, and the multiple optical wedges are arranged sequentially along the optical axis direction, and the multiple optical wedges have the same refractive index; the sum of the thicknesses of the multiple optical wedges gradually increases or decreases along the preset direction.

[0017] As an improvement to the Sham optical system described in this application, multiple optical wedges are provided, and the multiple optical wedges are arranged sequentially along the optical axis. The refractive index of at least one optical wedge is different from that of the other optical wedges, so that the dv of the meridional and sagittal components of the contrast of each field of view MTF at 110 lp / mm satisfies 0 ≤ dv ≤ 0.1.

[0018] As an improvement to the aforementioned Sham optical system of this application, the focal length f of the Sham lens satisfies 25mm≤f≤90mm, the aperture number Fno satisfies F1.7≤Fno≤F2.6, the field of view FOV satisfies 10mm≤FOV≤30mm, the magnification PMAG satisfies 0.5<PMAG<0.8, and the Sham angle α satisfies 30°≤α≤48°.

[0019] As an improvement to the SAM optical system described in this application, the SAM lens includes a front lens group and a rear lens group arranged coaxially from the object side to the image side. The focal length fa of the front lens group satisfies 20mm≤fa≤85mm, and the focal length fb of the rear lens group satisfies 15mm≤fb≤45mm. The axial distance d12 between the front lens group and the rear lens group satisfies 4mm≤d12≤18mm, and the axial distance d23 between the rear lens group and the optical wedge satisfies 20mm≤d23≤48mm.

[0020] As an improvement to the SAM optical system described in this application, the SAM lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens arranged coaxially from the object side to the image side; the sixth lens and the seventh lens are cemented lenses; wherein, the first lens is a biconvex lens, the second lens is a convex-planar lens, the third lens is a concave-convex lens, the fourth lens is a convex-concave lens, the fifth lens is a biconcave lens, the sixth lens is a concave-convex lens, the seventh lens is a concave-convex lens, the eighth lens is a concave-convex lens, the ninth lens is a biconvex lens, and the tenth lens is a convex-concave lens.

[0021] As an improvement to the Sham optical system described in this application, the first and second lenses have positive optical power, the third lens has negative optical power, the fourth lens has positive optical power, the fifth lens has negative optical power, the difference in Abbe number between the sixth and seventh lenses is greater than 35, and the eighth, ninth, and tenth lenses each have positive optical power.

[0022] As an improvement to the Sham optical system described in this application, one optical wedge is provided, and the center thickness CT0 of the optical wedge satisfies 1mm≤CT0≤4mm; a photosensitive chip is provided on the light-emitting side of the optical wedge, and the air gap BFL between the photosensitive surface of the optical wedge and the photosensitive chip along the optical axis satisfies 4mm≤BFL≤6mm; the refractive index N0 of the optical wedge satisfies 1.5≤N0≤1.6, and the Abbe number V0 satisfies 60≤V0≤65.

[0023] As an improvement to the Sham optical system described in this application, the radius of curvature R11 of the incident surface of the first lens satisfies 60mm ≤ R11 ≤ 65mm, and the radius of curvature R12 of the exit surface satisfies -80mm ≤ R12 ≤ -75mm; the radius of curvature R21 of the incident surface of the second lens satisfies 45mm ≤ R21 ≤ 50mm, and the radius of curvature R22 of the exit surface is infinite; the radius of curvature R31 of the incident surface of the third lens satisfies -115mm ≤ R31 ≤ - The radius of curvature R32 of the exit surface of the fourth lens satisfies -350mm≤R32≤-345mm; the radius of curvature R41 of the incident surface of the fourth lens satisfies 25mm≤R41≤30mm, and the radius of curvature R42 of the exit surface satisfies 25mm≤R42≤30mm; the radius of curvature R51 of the incident surface of the fifth lens satisfies -120mm≤R51≤-115mm, and the radius of curvature R52 of the exit surface satisfies 20mm≤R52≤25mm; The radius of curvature R61 of the incident surface of the sixth lens satisfies -20mm ≤ R61 ≤ -15mm, and the radius of curvature R62 of the exit surface satisfies -90mm ≤ R62 ≤ -85mm; the radius of curvature R71 of the incident surface of the seventh lens satisfies -90mm ≤ R71 ≤ -85mm, and the radius of curvature R72 of the exit surface satisfies -25mm ≤ R72 ≤ -20mm; the radius of curvature R81 of the incident surface of the eighth lens satisfies -135mm ≤ R81 ≤ -130mm. The radius of curvature R82 of the exit surface of the ninth lens satisfies -30mm≤R82≤-25mm; the radius of curvature R91 of the incident surface of the ninth lens satisfies 280mm≤R91≤285mm, and the radius of curvature R92 of the exit surface satisfies -135mm≤R92≤-130mm; the radius of curvature R101 of the incident surface of the tenth lens satisfies 45mm≤R101≤50mm, and the radius of curvature R102 of the exit surface satisfies 105mm≤R102≤110mm.

[0024] As an improvement to the Sham optical system described in this application, the center thickness GT1 of the first lens satisfies 3mm≤GT1≤6mm; the center thickness GT2 of the second lens satisfies 3mm≤GT2≤6mm; the center thickness GT3 of the third lens satisfies 4mm≤GT3≤7mm; the center thickness GT4 of the fourth lens satisfies 4mm≤GT4≤7mm; the center thickness GT5 of the fifth lens satisfies 1mm≤GT5≤4mm; the center thickness GT6 of the sixth lens satisfies 3mm≤GT6≤6mm; the center thickness GT7 of the seventh lens satisfies 4mm≤GT7≤7mm; the center thickness GT8 of the eighth lens satisfies 4mm≤GT8≤7mm; the center thickness GT9 of the ninth lens satisfies 3mm≤GT9≤6mm; and the center thickness GT10 of the tenth lens satisfies 3mm≤GT10≤6mm.

[0025] As an improvement to the Sham optical system described in this application, the air gap distance AT1 between the first lens and the second lens along the optical axis satisfies 0mm≤AT1≤2mm; the air gap distance AT2 between the second lens and the third lens along the optical axis satisfies 2mm≤AT2≤4mm; the air gap distance AT3 between the third lens and the fourth lens along the optical axis satisfies 1mm≤AT3≤3mm; the air gap distance AT4 between the fourth lens and the fifth lens along the optical axis satisfies 2mm≤AT4≤4mm; the air gap distance AT5 between the fifth lens and the sixth lens along the optical axis satisfies 14mm≤AT5≤16mm; the air gap distance AT6 between the seventh lens and the eighth lens along the optical axis satisfies 0mm≤AT6≤2mm; the air gap distance AT7 between the eighth lens and the ninth lens along the optical axis satisfies 0mm≤AT7≤2mm; the air gap distance AT8 between the ninth lens and the tenth lens along the optical axis satisfies 0mm≤AT8≤2mm; and the air gap distance AT9 between the tenth lens and the optical wedge along the optical axis satisfies 44mm≤AT9≤46mm.

[0026] As an improvement to the Sham optical system described in this application, a photosensitive chip is provided on the light-emitting side of the optical wedge; the air gap distance AT9 between the tenth lens and the optical wedge along the optical axis and the air gap distance BFL between the photosensitive surfaces of the optical wedge and the photosensitive chip along the optical axis satisfy 7.3 < AT9 / BFL < 11.5; the air gap distance BFL between the photosensitive surfaces of the optical wedge and the photosensitive chip along the optical axis and the total optical length TTL of the Sham optical system satisfy 0.03 < BFL / TTL < 0.06.

[0027] As an improvement to the Sham optical system described in this application, the focal length f1 of the first lens satisfies 50mm≤f1≤60mm; the focal length f2 of the second lens satisfies 60mm≤f2≤70mm; the focal length f3 of the third lens satisfies -230mm≤f3≤-220mm; the focal length f4 of the fourth lens satisfies 580mm≤f4≤590mm; the focal length f5 of the fifth lens satisfies -30mm≤f5≤-20mm; the focal length f6 of the sixth lens satisfies -20mm≤f6≤-10mm; the focal length f7 of the seventh lens satisfies 30mm≤f7≤40mm; the focal length f8 of the eighth lens satisfies 50mm≤f8≤60mm; the focal length f9 of the ninth lens satisfies 100mm≤f9≤110mm; and the focal length f10 of the tenth lens satisfies 110mm≤f10≤120mm.

[0028] As an improvement to the Sham optical system described in this application, the focal length f1 of the first lens and the focal length f of the Sham lens satisfy 0.6 < f1 / f < 0.9; the focal length f2 of the second lens and the focal length f of the Sham lens satisfy 0.7 < f2 / f < 1; the focal length f3 of the third lens and the focal length f of the Sham lens satisfy 2.7 < |f3 / f| < 3.3; the focal length f4 of the fourth lens and the focal length f of the Sham lens satisfy 7.2 < f4 / f < 8.5; and the focal length f5 of the fifth lens and the focal length f of the Sham lens satisfy 0.2 < |f1 / f| < 0.9. 5 / f|<0.5; the focal length f6 of the sixth lens and the focal length f of the Sham lens satisfy 0.1<|f6 / f|<0.3; the focal length f7 of the seventh lens and the focal length f of the Sham lens satisfy 0.3<f7 / f<0.6; the focal length f8 of the eighth lens and the focal length f of the Sham lens satisfy 0.6<f8 / f<0.9; the focal length f9 of the ninth lens and the focal length f of the Sham lens satisfy 1.2<f9 / f<1.6; the focal length f10 of the tenth lens and the focal length f of the Sham lens satisfy 1.3<f10 / f<1.8.

[0029] As an improvement to the Sham optical system described in this application, the refractive index N1 of the first lens satisfies 1.6≤N1≤1.7, and the Abbe number V1 satisfies 65≤V1≤70; the refractive index N2 of the second lens satisfies 1.6≤N2≤1.7, and the Abbe number V2 satisfies 55≤V2≤60; the refractive index N3 of the third lens satisfies 1.6≤N3≤1.7, and the Abbe number V3 satisfies 30≤V3≤35; the refractive index N4 of the fourth lens satisfies 1.7≤N4≤1.8, and the Abbe number V4 satisfies 50≤V4≤55; the refractive index N5 of the fifth lens satisfies 1.8≤N5≤1.9, and the Abbe number V5 satisfies 4... The refractive index N6 of the sixth lens satisfies 1.8≤N6≤1.9, and the Abbe number V6 satisfies 25≤V6≤30; the refractive index N7 of the seventh lens satisfies 1.5≤N7≤1.6, and the Abbe number V7 satisfies 60≤V7≤70; the refractive index N8 of the eighth lens satisfies 1.6≤N8≤1.7, and the Abbe number V8 satisfies 45≤V8≤50; the refractive index N9 of the ninth lens satisfies 1.8≤N9≤1.9, and the Abbe number V9 satisfies 45≤V9≤50; the refractive index N10 of the tenth lens satisfies 1.6≤N10≤1.7, and the Abbe number V10 satisfies 55≤V10≤60.

[0030] As an improvement to the Sham optical system described in this application, the radius of curvature R61 of the incident surface of the sixth lens and the radius of curvature R72 of the exit surface of the seventh lens satisfy 0.6 < R61 / R72 < 1; the center thickness GT6 of the sixth lens and the center thickness GT7 of the seventh lens satisfy 0.4 < GT6 / GT7 < 1.5; and the Abbe number V6 of the sixth lens and the Abbe number V7 of the seventh lens satisfy 30 < |V6 - V7| < 45.

[0031] As an improvement to the Sham optical system described in this application, the working distance WD of the Sham lens satisfies 60mm≤WD≤90mm, and the magnification PMAG satisfies 0.5≤PMAG≤0.6; the focal length f of the Sham lens satisfies 70mm≤f≤80mm; the aperture number Fno satisfies F1.8≤Fno≤F2.1; the working wavelength WL satisfies 380mm≤WL≤450mm, and the Sham angle α satisfies 33°≤α≤38°; a photosensitive chip is provided on the light-emitting side of the light wedge, and the focal length f of the Sham lens and the target surface size IMG of the photosensitive chip satisfy 3.5<f / IMG<8.

[0032] As an improvement to the Sham optical system described in this application, the first lens, the second lens, the third lens, the fourth lens, and the fifth lens form a front lens group; the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens form a rear lens group; the focal length fa of the front lens group satisfies 70mm≤fa≤80mm, and the focal length fb of the rear lens group satisfies 25mm≤fb≤35mm; the axial distance d12 between the front lens group and the rear lens group satisfies 14mm≤d12≤16mm, and the axial distance d23 between the rear lens group and the optical wedge satisfies 43mm≤d23≤45mm.

[0033] As an improvement to the Sham optical system described in this application, the focal length fa of the front lens group and the focal length f of the Sham lens satisfy 0.8 < fa / f < 1.2; the focal length fb of the rear lens group and the focal length f of the Sham lens satisfy 0.3 < fb / f < 0.5; and the axial distance d12 between the front lens group and the rear lens group and the axial distance d23 between the rear lens group and the optical wedge satisfy 0.3 < d12 / d23 < 0.4.

[0034] As an improvement to the SAM optical system described in this application, the field curvature of the SAM optical system is less than 0.05 mm, the distortion of the SAM optical system is less than 0.05%, and the contrast of the MTF value of the SAM optical system at 110 lp / mm is greater than 0.5.

[0035] As an improvement to the SAM optical system described in this application, the SAM lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens arranged coaxially from the object side to the image side; the third lens and the fourth lens are cemented lenses, and the fifth lens and the sixth lens are cemented lenses; an aperture stop is provided between the fourth lens and the fifth lens; wherein, the first lens is a biconvex lens, the second lens is a convex-concave lens, the third lens is a convex-concave lens, the fourth lens is a convex-concave lens, the fifth lens is a concave-convex lens, the sixth lens is a concave-convex lens, the seventh lens is a concave-convex lens, the eighth lens is a biconvex lens, and the ninth lens is a convex-planar lens.

[0036] As an improvement to the Sham optical system described in this application, the first lens, the second lens, and the third lens have positive optical power, the fourth lens has negative optical power, the Abbe number difference between the fifth lens and the sixth lens is greater than 35, and the seventh lens, the eighth lens, and the ninth lens each have positive optical power.

[0037] As an improvement to the Sham optical system described in this application, the radius of curvature R11 of the incident surface of the first lens satisfies 45mm≤R11≤50mm, and the radius of curvature R12 of the exit surface satisfies -100mm≤R12≤-95mm; the radius of curvature R21 of the incident surface of the second lens satisfies 5mm≤R21≤10mm, and the radius of curvature R22 of the exit surface satisfies 10mm≤R22≤15mm; the radius of curvature R31 of the incident surface of the third lens satisfies 10mm≤R31≤15mm, and the radius of curvature R32 of the exit surface satisfies 5mm≤R32≤10mm; the radius of curvature R41 of the incident surface of the fourth lens satisfies 5mm≤R41≤10mm, and the radius of curvature R42 of the exit surface satisfies 10mm≤R42≤15mm; the radius of curvature R51 of the incident surface of the fifth lens satisfies -15mm≤R12≤-95mm. The radius of curvature R51 of the incident surface of the sixth lens satisfies -40mm≤R52≤-35mm; the radius of curvature R61 of the incident surface of the seventh lens satisfies -40mm≤R61≤-35mm; the radius of curvature R62 of the exit surface satisfies -15mm≤R62≤-10mm; the radius of curvature R71 of the incident surface of the seventh lens satisfies -40mm≤R71≤-35mm; the radius of curvature R72 of the exit surface satisfies -25mm≤R72≤-20mm; the radius of curvature R81 of the incident surface of the eighth lens satisfies 90mm≤R81≤100mm; the radius of curvature R82 of the exit surface satisfies -55mm≤R82≤-50mm; the radius of curvature R91 of the incident surface of the ninth lens satisfies 50mm≤R91≤55mm; and the radius of curvature R92 of the exit surface is infinite.

[0038] As an improvement to the Sham optical system described in this application, the center thickness GT1 of the first lens satisfies 2mm≤GT1≤5mm; the center thickness GT2 of the second lens satisfies 2mm≤GT2≤5mm; the center thickness GT3 of the third lens satisfies 3mm≤GT3≤6mm; the center thickness GT4 of the fourth lens satisfies 2mm≤GT4≤5mm; the center thickness GT5 of the fifth lens satisfies 3mm≤GT5≤6mm; the center thickness GT6 of the sixth lens satisfies 3mm≤GT6≤6mm; the center thickness GT7 of the seventh lens satisfies 2mm≤GT7≤5mm; the center thickness GT8 of the eighth lens satisfies 3mm≤GT8≤6mm; the center thickness GT9 of the ninth lens satisfies 2mm≤GT9≤5mm; a photosensitive chip is provided on the light-emitting side of the light wedge, and the air gap distance BFL between the light-sensitive surface of the light wedge and the photosensitive surface of the photosensitive chip along the optical axis satisfies 7mm≤BFL≤9mm.

[0039] As an improvement to the Sham optical system described in this application, the air gap AT1 between the first lens and the second lens along the optical axis satisfies 0mm≤AT1≤2mm; the air gap AT2 between the second lens and the third lens along the optical axis satisfies 1mm≤AT2≤3mm; the third lens and the fourth lens are cemented lenses; the air gap AT3 between the fourth lens and the aperture stop along the optical axis satisfies 0mm≤AT3≤2mm; the air gap AT4 between the aperture stop and the fifth lens along the optical axis satisfies 5mm≤AT4≤7mm; the fifth lens and the sixth lens are cemented lenses; the air gap AT5 between the sixth lens and the seventh lens along the optical axis satisfies 2mm≤AT5≤4mm; the air gap AT6 between the seventh lens and the eighth lens along the optical axis satisfies 0mm≤AT6≤2mm; the air gap AT7 between the eighth lens and the ninth lens along the optical axis satisfies 0mm≤AT8≤2mm; and the air gap AT8 between the ninth lens and the optical wedge along the optical axis satisfies 17mm≤AT8≤19mm.

[0040] As an improvement to the Sham optical system described in this application, a photosensitive chip is provided on the light-emitting side of the optical wedge. The air gap distance AT8 between the ninth lens and the optical wedge along the optical axis and the air gap distance BFL between the photosensitive surfaces of the optical wedge and the photosensitive chip along the optical axis satisfy 1.8 < AT8 / BFL < 2.8; the air gap distance BFL between the photosensitive surfaces of the optical wedge and the photosensitive chip along the optical axis and the total optical length TTL of the Sham optical system satisfy 0.08 < BFL / TTL < 0.2.

[0041] As an improvement to the Sham optical system described in this application, the focal length f1 of the first lens satisfies 30mm≤f1≤40mm; the focal length f2 of the second lens satisfies 135mm≤f2≤145mm; the focal length f3 of the third lens satisfies 25mm≤f3≤35mm; the focal length f4 of the fourth lens satisfies -20mm≤f4≤-10mm; the focal length f5 of the fifth lens satisfies -15mm≤f5≤-5mm; the focal length f6 of the sixth lens satisfies 15mm≤f6≤25mm; the focal length f7 of the seventh lens satisfies 70mm≤f7≤80mm; the focal length f8 of the eighth lens satisfies 40mm≤f8≤50mm; and the focal length f9 of the ninth lens satisfies 60mm≤f9≤70mm.

[0042] As an improvement to the Sham optical system described in this application, the focal length f1 of the first lens and the focal length f of the Sham lens satisfy 0.6 < f1 / f < 1.2; the focal length f2 of the second lens and the focal length f of the Sham lens satisfy 3 < f2 / f < 4.2; the focal length f3 of the third lens and the focal length f of the Sham lens satisfy 0.5 < f3 / f < 1; the focal length f4 of the fourth lens and the focal length f of the Sham lens satisfy 0.2 < |f4 / f| < 0.6; the focal length f5 of the fifth lens and the focal length f of the Sham lens satisfy 0.2 < |f4 / f| < 0.6; The focal lengths f of the SAM lens satisfy 0.1 < |f5 / f| < 0.5; the focal length f6 of the sixth lens satisfies 0.3 < f6 / f < 0.8 with the focal length f of the SAM lens; the focal length f7 of the seventh lens satisfies 1.5 < f7 / f < 2.3 with the focal length f of the SAM lens; the focal length f8 of the eighth lens satisfies 0.8 < f8 / f < 1.5 with the focal length f of the SAM lens; and the focal length f9 of the ninth lens satisfies 1.3 < f9 / f < 2.0 with the focal length f of the SAM lens.

[0043] As an improvement to the Sham optical system described in this application, the refractive index N1 of the first lens satisfies 1.8 ≤ N1 ≤ 1.9, and the Abbe number V1 satisfies 45 ≤ V1 ≤ 50; the refractive index N2 of the second lens satisfies 1.5 ≤ N2 ≤ 1.6, and the Abbe number V2 satisfies 55 ≤ V2 ≤ 60; the refractive index N3 of the third lens satisfies 1.8 ≤ N3 ≤ 1.9, and the Abbe number V3 satisfies 30 ≤ V3 ≤ 35; the refractive index N4 of the fourth lens satisfies 1.5 ≤ N4 ≤ 1.6, and the Abbe number V4 satisfies 55 ≤ V4 ≤ 60; the refractive index N... The refractive index of the sixth lens N6 satisfies 1.8 ≤ N5 ≤ 1.9, and the Abbe number V5 satisfies 25 ≤ V5 ≤ 30; the refractive index of the seventh lens N7 satisfies 1.5 ≤ N6 ≤ 1.6, and the Abbe number V6 satisfies 65 ≤ V6 ≤ 70; the refractive index of the seventh lens N7 satisfies 1.8 ≤ N7 ≤ 1.9, and the Abbe number V7 satisfies 45 ≤ V7 ≤ 50; the refractive index of the eighth lens N8 satisfies 1.6 ≤ N8 ≤ 1.7, and the Abbe number V8 satisfies 55 ≤ V8 ≤ 60; the refractive index of the ninth lens N9 satisfies 1.7 ≤ N9 ≤ 1.8, and the Abbe number V9 satisfies 40 ≤ V9 ≤ 45.

[0044] As an improvement to the Sham optical system described in this application, the radius of curvature R31 of the incident surface of the third lens and the radius of curvature R42 of the exit surface of the fourth lens satisfy 0.6 < R31 / R42 < 1.5; the radius of curvature R51 of the incident surface of the fifth lens and the radius of curvature R62 of the exit surface of the sixth lens satisfy 0.6 < R51 / R62 < 1.5; the center thickness GT3 of the third lens and the center thickness GT4 of the fourth lens satisfy 0.6 < GT3 / GT4 < 3; the center thickness GT6 of the fifth lens and the center thickness GT6 of the sixth lens satisfy 0.5 < GT5 / GT6 < 2; the Abbe number V3 of the third lens and the Abbe number V4 of the fourth lens satisfy 20 < |V3 - V4| < 30; the Abbe number V5 of the fifth lens and the Abbe number V6 of the sixth lens satisfy 35 < |V5 - V6| < 45.

[0045] As an improvement to the aforementioned Sham optical system of this application, the working distance WD of the Sham lens satisfies 30mm≤WD≤60mm, and the magnification PMAG satisfies 0.6≤PMAG≤0.7; the focal length f of the Sham lens satisfies 35mm≤f≤45mm; the aperture number Fno satisfies F2.1≤Fno≤F2.4; the working wavelength WL satisfies 380mm≤WL≤450mm, and the Sham angle α satisfies 40°≤α≤45°; a photosensitive chip is provided on the light-emitting side of the light wedge, and the focal length f of the Sham lens and the target surface size IMG of the photosensitive chip satisfy 1.9<f / IMG<4.

[0046] As an improvement to the Sham optical system described in this application, the first lens, the second lens, the third lens, and the fourth lens form a front lens group; the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens form a rear lens group; the focal length fa of the front lens group satisfies 25mm≤fa≤35mm, and the focal length fb of the rear lens group satisfies 20mm≤fb≤30mm; the axial distance d12 between the front lens group and the rear lens group satisfies 6mm≤d12≤8mm, and the axial distance d23 between the rear lens group and the optical wedge satisfies 27mm≤d23≤29mm.

[0047] As an improvement to the Sham optical system described in this application, the focal length fa of the front lens group and the focal length f of the Sham lens satisfy 0.5 < fa / f < 1; the focal length fb of the rear lens group and the focal length f of the Sham lens satisfy 0.4 < fb / f < 1.2; the axial distance d12 between the front lens group and the rear lens group and the axial distance d23 between the rear lens group and the optical wedge satisfy 0.2 < d12 / d23 < 0.3.

[0048] A third aspect of this application also provides an electronic device that includes the sensor module described in any of the first aspects, or the SAM optical system described in the second aspect.

[0049] The electronic device provided in the third aspect of this application, since it includes the sensor module described in the first aspect or the SAM optical system described in the second aspect, also has the same advantages as the sensor module described in the first aspect or the SAM optical system described in the second aspect.

[0050] As an improvement to the electronic device described in this application, the electronic device is a 3D camera. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only a part of the embodiments of this application. These drawings and text descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a diagram of the principle of Scham's Law.

[0053] Figure 2 This is a schematic diagram of the structure of the sensor module provided in the embodiments of this disclosure;

[0054] Figure 3 This is a schematic diagram of the optical wedge structure of the sensor module provided in the embodiments of this disclosure;

[0055] Figure 4 A schematic diagram of the light beams of the Sham optical system provided in an embodiment of this disclosure;

[0056] Figure 5 This is a schematic diagram of the structure of the Sham optical system provided in an embodiment of the present disclosure;

[0057] Figure 6 Field curvature diagram of the Schahm optical system provided in the embodiments of this disclosure;

[0058] Figure 7 Distortion diagram of the Schahm optical system provided in the embodiments of this disclosure;

[0059] Figure 8 MTF curve of the Sham optical system provided in the embodiments of this disclosure;

[0060] Figure 9Another schematic diagram of the Sham optical system provided in an embodiment of this disclosure.

[0061] Explanation of reference numerals in the attached figures

[0062] 10: Optical wedge; 20: Image sensor; 30: SAM lens; 31: Front lens group; 32: Rear lens group; 33: Aperture stop. Detailed Implementation

[0063] With the development of image processing and computer technology, machine vision technology has become widely used due to its advantages of high precision, high speed, and high stability. In the field of industrial measurement, high-magnification lenses are often used to photograph the target at close range to achieve the inspection of micron-level precision components. Among them, the optical lens is an important component, and its resolution and distortion are crucial to the inspection effect. Traditional coaxial optical lenses are limited by the imaging law of near objects appearing larger and farther objects appearing smaller, as well as by the depth of field, making it difficult to achieve clear imaging of the target across the entire field of view.

[0064] The Schimmel optical system is an imaging system that utilizes Schimmel's law. According to Schimmel's law, when the extensions of the target plane, the lens principal plane, and the imaging plane intersect on a single line, a clear image can be captured across the entire field of view of the tilted target. When Schimmel lenses are used in industrial measurement, they can increase the range of sharpness and improve measurement accuracy.

[0065] The imaging plane of a SAM lens is tilted relative to the optical axis. The optical path length of light rays reaching the imaging plane varies at different positions, resulting in geometric aberrations and affecting image quality. In particular, when a SAM lens is used at close working distances and high magnification, these geometric aberrations are more pronounced, leading to poor image quality and impacting detection performance.

[0066] Specific combination Figure 1 The diagram of Scherm's Law shows that the angle β between the imaging plane and the optical axis of the lens must satisfy the following relationship:

[0067]

[0068] Where α is the angle between the target plane and the lens optical axis, β is the angle between the imaging plane and the lens optical axis; a' is the object distance of point D on the lens optical axis, b' is the image distance of point D on the optical axis, and f' is the focal length of the lens.

[0069] The magnification formula for the Sham optical path is:

[0070] α = arctan(PMAG × tanβ)

[0071] Where PMAG represents the lens magnification.

[0072] From the two formulas above, it can be seen that when the angle α between the target plane and the lens optical axis is constant, the higher the lens magnification (PMAG) and the smaller the tanβ, the smaller the angle β between the imaging plane and the lens optical axis. However, the larger the deviation angle (90°-β) of the imaging plane relative to the plane perpendicular to the lens optical axis, the greater the optical path difference between light rays reaching the imaging plane from different positions, resulting in greater geometric aberrations in the detector imaging and making it more difficult for the lens to clearly image a tilted target plane.

[0073] In view of this, the embodiments of this application correct the geometric aberrations of the SAM lens by adding a light wedge with a small tilt angle between the SAM lens and the image sensor, thereby achieving a clear imaging effect with high resolution and low distortion on the tilted target plane, which is suitable for application in micron-level high-precision detection scenarios.

[0074] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0075] Example 1

[0076] Figure 2 This is a schematic diagram of the structure of the sensor module provided in the embodiments of this disclosure; Figure 3 This is a schematic diagram of the optical wedge structure of the sensor module provided in an embodiment of this disclosure.

[0077] Combination Figure 2 and Figure 3 This disclosure provides a sensor module for use in a SAM optical path, comprising an optical wedge 10 and a photosensitive chip 20. The optical wedge 10 is encapsulated on one side of the photosensitive surface of the photosensitive chip 20, allowing light to be imaged onto the photosensitive surface of the photosensitive chip 20 via the optical wedge 10. Thus, the optical wedge 10 is located on the light-incident side of the photosensitive chip 20, protecting the photosensitive chip 20 and shielding it from dust and other debris. No additional light-transmitting cover is required on the light-incident side of the photosensitive chip 20.

[0078] In this embodiment, the incident and exit surfaces of the optical wedge 10 are both planar, and a preset angle exists between them, causing the thickness of the optical wedge 10 to vary along a preset direction. This preset direction is coplanar with and perpendicular to the optical axis of the Sham optical path. The incident surface of the optical wedge 10 faces the object side, and the exit surface faces the photosensitive chip 20. The preset angle is greater than 0° and can be less than or equal to 2°, for example, 1°, 1.5°, etc.

[0079] In some embodiments, one of the incident surface and the exit surface of the optical wedge 10 is perpendicular to the optical axis O, and the preset angle A1 between the incident surface and the exit surface of the optical wedge 10 satisfies 0° < A1 ≤ 2°. This configuration facilitates the processing of the optical wedge 10 and the setting of its angle. (Refer to...) Figure 3 The incident surface 11 of the optical wedge 10 is perpendicular to the optical axis O, and the exit surface 12 of the optical wedge 10 is not perpendicular to the optical axis O. The angle between the exit surface 12 and the optical axis O is A1, thus forming a preset angle A1 between the incident surface 11 and the exit surface 12 of the optical wedge 10. Figure 3 In the middle, along the preset direction (attached) Figure 3 (The arrow in the image indicates that the thickness of the optical wedge 10 gradually increases.)

[0080] In other embodiments, the incident and exit surfaces of the optical wedge 10 are not perpendicular to the optical axis O, and a preset angle is formed between the incident and exit surfaces of the optical wedge 10.

[0081] In this embodiment, the distance between the incident surface and the exit surface of the optical wedge 10 is the thickness of the optical wedge 10, and the thickness of the optical wedge 10 gradually increases or decreases along a preset direction. Thus, when light passes through the optical wedge 10, the optical path lengths of the meridional and sagittal beams in the light are corrected, reducing the distance between the convergence points of the meridional and sagittal beams, thereby correcting the geometric aberrations caused by the tilted imaging photosensitive surface and improving image quality.

[0082] The optical wedge 10 in this embodiment can be colorless optical glass or optical plastic, etc. The number of optical wedges 10 can be one, two, three, or more, and is not limited here.

[0083] With the above settings, the object-side light is imaged onto the photosensitive chip 20 via the optical wedge 10. After the light is refracted by the optical wedge 10, the optical path difference between the meridional beam and the sagittal beam in the light is reduced, which reduces the distance between the convergence point of the meridional beam and the convergence point of the sagittal beam. This reduces the geometric aberrations caused by the tilted imaging photosensitive surface, improves the imaging quality of the SAM optical system, and thus improves the detection accuracy of the SAM optical system.

[0084] In the sensor module of this embodiment, object-side light is imaged onto the photosensitive chip 20 via the optical wedge 10, and the difference dv between the meridional component and the sagittal component of the MTF (modulation transfer function) of each field of view at a contrast of 110 lp / mm satisfies 0 ≤ dv ≤ 0.1. This corrects the geometric aberrations caused by the tilted imaging photosensitive surface, improves the imaging quality of the SAM optical system, and further improves the detection accuracy of the SAM optical system.

[0085] In some embodiments, multiple optical wedges 10 are provided, arranged sequentially along the optical axis, and all optical wedges 10 have the same refractive index; the sum of the thicknesses of the multiple optical wedges 10 gradually increases or decreases along a preset direction. This arrangement ensures that after light passes through the multiple optical wedges 10, the optical path lengths of the meridional and sagittal beams are corrected, reducing the distance between the convergence points of the meridional and sagittal beams, thereby correcting the geometric aberrations caused by the tilted imaging sensor.

[0086] In other embodiments, multiple optical wedges 10 are provided, arranged sequentially along the optical axis. At least one optical wedge 10 has a different refractive index than the others, ensuring that the dv of the meridional and sagittal components of the contrast at 110 lp / mm for each field of view's MTF satisfies 0 ≤ dv ≤ 0.1. Thus, under the combined effect of the preset angle and material of the optical wedges 10, the optical path lengths of the meridional and sagittal beams in the light are corrected, thereby reducing geometric aberrations caused by the tilted imaging sensor.

[0087] When multiple optical wedges 10 are provided, there can be a gap between two adjacent optical wedges 10, or the gap between two adjacent optical wedges 10 can be zero.

[0088] The sensor assembly of this embodiment includes an optical wedge 10 and a photosensitive chip 20. The optical wedge 10 is encapsulated on one side of the photosensitive surface of the photosensitive chip 20. On the one hand, the incident surface and the exit surface of the optical wedge 10 form a preset angle. After the light is refracted by the optical wedge 10, the optical path difference between the meridional beam and the sagittal beam in the light is reduced, thereby reducing the geometric aberration caused by the imaging photosensitive surface that is tilted relative to the optical axis. On the other hand, the optical wedge 10 encapsulated on one side of the photosensitive surface of the photosensitive chip 20 replaces the original light-transmitting cover plate, which plays the role of protecting the photosensitive chip 20 and blocking dust and other impurities.

[0089] It should be noted that the sensor module provided in Embodiment 1 of this disclosure can be applied to any SAM lens and can correct the geometric aberrations caused by the tilted imaging photosensitive surface.

[0090] Example 2

[0091] Figure 4 This is a schematic diagram of the light rays of the Schamm optical system provided in an embodiment of this disclosure. Figure 5 This is a schematic diagram of the structure of the Sham optical system provided in an embodiment of the present disclosure.

[0092] Combination Figure 4 and Figure 5This disclosure provides a Schahm optical system, which includes a Schahm lens 30, an optical wedge 10, and a photosensitive chip 20 arranged sequentially from the object side to the image side along the optical axis. The photosensitive chip 20 and the Schahm lens 30 satisfy Schahm's law, and the object-side light rays pass through the Schahm lens 30 and the optical wedge 10 in sequence to form an image on the photosensitive chip 20.

[0093] The incident and exit surfaces of the optical wedge 10 are both planes, and there is a preset angle between the incident and exit surfaces of the optical wedge 10. In this embodiment, the structure, function, and effect of the optical wedge 10 are the same as those in Embodiment 1 above, and can be referred to the above embodiment for details, which will not be repeated here.

[0094] It should be noted that in this embodiment of the present disclosure, the SAM optical system does not provide a light-transmitting cover plate for protection on the photosensitive side of the photosensitive chip 20. The optical wedge 10 can play the same role as the light-transmitting cover plate. Furthermore, the incident surface and the exit surface of the optical wedge 10 have a preset angle. After the light is refracted by the optical wedge 10, the optical path difference between the meridional beam and the sagittal beam in the light is reduced, thereby reducing the geometric aberrations caused by the imaging photosensitive surface that is tilted relative to the optical axis.

[0095] In this embodiment, the optical wedge 10 can be encapsulated on the light-emitting side of the SAM lens 30, thus forming an integral unit with the SAM lens 30; alternatively, the optical wedge 10 can be encapsulated on the light-incident side of the photosensitive chip 20, forming an image sensor with the photosensitive chip 20. In this case, the optical wedge 10 replaces the light-transmitting cover, which not only corrects geometric aberrations but also protects the photosensitive chip 20. Of course, the optical wedge 10 can also exist independently in the SAM optical system.

[0096] The Sham lens of this embodiment comprises a front lens group 31 and a rear lens group 32 arranged coaxially from the object side to the image side. Each of the front lens group 31 and the rear lens group 32 is composed of at least one lens. The front lens group 31 and the rear lens group 32 may include split lenses and cemented lenses. The front lens group 31 and the rear lens group 32 may be entirely spherical lenses, entirely aspherical lenses, or a combination of spherical and aspherical lenses.

[0097] The Sham lens of this disclosure embodiment has the following parameters:

[0098] Table 1

[0099] Focal length f / mm Aperture number Fno Field of view (FOV / mm) magnification Cape Sham α 25～90 F1.7~F2.6 10～30 0.5～0.8 30°～48°

[0100] Table 2

[0101] Lens group name Focal length / mm Axial distance from the next lens group / mm Front lens group 20～85 4～18 Rear lens group 15～45 20～48

[0102] Among them, Sham angle α is Figure 1The angle between the target plane and the lens optical axis. The axial spacing is the air gap along the optical axis; when multiple optical wedges 10 are provided, the axial spacing d23 between the rear lens group 32 and one of the optical wedges closest to the Sham lens satisfies 20mm≤d23≤48mm. In the table above, the range indicated by "~" includes the endpoint values.

[0103] In this embodiment, the lenses and optical wedges of the SAM lens can be made of colorless optical glass or optical plastic. Optical plastic is low-cost, easy to process into aspherical surfaces, and lightweight during mass production. Optical glass has stable mechanical and thermal properties, and chromatic aberration can be eliminated and image quality improved by combining different refractive indices and Abbe numbers. Industrial robots are used in diverse environments and require high environmental temperature stability.

[0104] In some embodiments, the working distance WD of the Sham lens satisfies 60mm≤WD≤90mm, the magnification PMAG satisfies 0.5≤PMAG≤0.6; the focal length f of the Sham lens satisfies 70mm≤f≤80mm; the aperture number Fno satisfies F1.8≤Fno≤F2.1; the working wavelength WL satisfies 380mm≤WL≤450mm, and the Sham angle α satisfies 33°≤α≤38°.

[0105] The focal length f of the SAM lens and the target surface size IMG of the image sensor satisfy 3.5 < f / IMG < 8.

[0106] like Figure 4 and Figure 5 As shown, the Sham lens 30 of this application embodiment includes a first lens G1, a second lens G2, a third lens G3, a fourth lens G4, a fifth lens G5, a sixth lens G6, a seventh lens G7, an eighth lens G8, a ninth lens G9, and a tenth lens G10 arranged coaxially from the object side to the image side; the sixth lens G6 and the seventh lens G7 are cemented lenses. The first lens G1 is the lens closest to the object side.

[0107] The first lens G1, the second lens G2, the third lens G3, the fourth lens G4, and the fifth lens G5 form the front lens group 31; the sixth lens G6, the seventh lens G7, the eighth lens G8, the ninth lens G9, and the tenth lens G10 form the rear lens group 32. An optical wedge 10 is disposed between the tenth lens G10 and the photosensitive chip.

[0108] The focal length fa of the front lens group 31 satisfies 70mm≤fa≤80mm, and the focal length fb of the rear lens group 32 satisfies 25mm≤fb≤35mm.

[0109] The axial distance d12 between the front lens group 31 and the rear lens group 32 satisfies 14mm≤d12≤16mm, and the axial distance d23 between the rear lens group 32 and the optical wedge 10 satisfies 43mm≤d23≤45mm.

[0110] The focal length fa of the front lens group 31 and the focal length f of the SAM lens 30 satisfy 0.8 < fa / f < 1.2; the focal length fb of the rear lens group 32 and the focal length f of the SAM lens 30 satisfy 0.3 < fb / f < 0.5; the axial distance d12 between the front lens group 31 and the rear lens group 32 and the axial distance d23 between the rear lens group 32 and the optical wedge 10 satisfy 0.3 < d12 / d23 < 0.4.

[0111] Continue to refer to Figure 4 and Figure 5 The first lens G1 is a biconvex lens, the second lens G2 is a convex-planar lens, the third lens G3 is a concave-convex lens, the fourth lens G4 is a convex-concave lens, the fifth lens G5 is a biconcave lens, the sixth lens G6 is a concave-convex lens, the seventh lens G7 is a concave-convex lens, the eighth lens G8 is a concave-convex lens, the ninth lens G9 is a biconvex lens, and the tenth lens G10 is a convex-concave lens.

[0112] In this embodiment, the number of front lens groups 31 and the number of rear lens groups 32 are symmetrical, which helps to reduce the optical distortion of the SAM lens.

[0113] The first lens G1 and the second lens G2 have positive optical power, which can converge off-axis beams with large angles caused by the near working distance while correcting spherical aberration.

[0114] The third lens G3 has negative optical power. When combined with the first lens G1 and the second lens G2, it has positive and negative optical power, which can quickly achieve the deflection of the light angle and reduce the angle between the beam and the optical axis.

[0115] The fourth lens G4 has positive optical power, and the fifth lens G5 has negative optical power. The combination of positive and negative optical power of the fourth lens G4 and the fifth lens G5 can expand the optical path, enabling the system to meet the application requirements of larger imaging targets. Furthermore, the exit surface of the fifth lens G5 acts as an aperture stop, which can effectively control the light and eliminate coma.

[0116] The sixth lens G6 and the seventh lens G7 are cemented lenses, and the difference in Abbe number between the sixth lens G6 and the seventh lens G7 is greater than 35, which can further eliminate the chromatic aberration generated in the previous optical path and perform chromatic aberration correction on the beams converging on the image plane.

[0117] The eighth lens G8, the ninth lens G9, and the tenth lens G10 each have positive optical power, reducing the incident angle of the principal ray on the image plane, thereby balancing field curvature and off-axis aberrations.

[0118] For the SAM lens configured as described above, in this embodiment, an optical wedge 10 is provided. The incident surface of the optical wedge 10 is perpendicular to the optical axis, and the exit surface of the optical wedge 10 is inclined relative to the normal plane of the optical axis. The preset angle A1 between the incident and exit surfaces of the optical wedge 10 satisfies 0° < A1 ≤ 2°. The preset angle A1 of the optical wedge 10 is small, making the optical wedge 10 a weak optical wedge. Under the action of the optical wedge 10, astigmatism caused by the angle between the photosensitive surface of the photosensitive chip 20 and the optical axis of the lens is corrected.

[0119] In this embodiment, the optical wedge 10 also has the following characteristics: the center thickness CT0 of the optical wedge 10 satisfies 1mm≤CT0≤4mm; the air gap distance BFL between the optical wedge 10 and the photosensitive surface of the photosensitive chip 20 along the optical axis satisfies 4mm≤BFL≤6mm; the refractive index N0 of the optical wedge 10 satisfies 1.5≤N0≤1.6, and the Abbe number V0 satisfies 60≤V0≤65.

[0120] Therefore, through the above-described SAM lens design and optical wedge 10 design of the embodiments of this disclosure, the SAM optical system can effectively balance and process various aberrations under conditions of close working distance and high magnification, thereby improving the imaging performance of the SAM optical system.

[0121] The following section introduces the optical parameters of each lens, such as radius of curvature, focal length, and center thickness.

[0122] In this embodiment, the radius of curvature R11 of the incident surface of the first lens G1 satisfies 60mm ≤ R11 ≤ 65mm, and the radius of curvature R12 of the exit surface satisfies -80mm ≤ R12 ≤ -75mm; the radius of curvature R21 of the incident surface of the second lens G2 satisfies 45mm ≤ R21 ≤ 50mm, and the radius of curvature R22 of the exit surface is infinite; the radius of curvature R31 of the incident surface of the third lens G3 satisfies -115mm ≤ R31 ≤ -110mm, and the radius of curvature R22 of the exit surface is infinite. The radius of curvature R32 of the incident surface of the fourth lens G4 satisfies -350mm≤R32≤-345mm; the radius of curvature R41 of the incident surface of the fifth lens G5 satisfies 25mm≤R41≤30mm, and the radius of curvature R42 of the exit surface satisfies 25mm≤R42≤30mm; the radius of curvature R51 of the incident surface of the fifth lens G5 satisfies -120mm≤R51≤-115mm, and the radius of curvature R52 of the exit surface satisfies 20mm≤R52≤25mm; the radius of curvature R51 of the incident surface of the sixth lens G6 satisfies -120mm≤R51≤-115mm, and the radius of curvature R52 of the exit surface satisfies 20mm≤R52≤25mm; The radius of curvature R61 of the incident surface satisfies -20mm ≤ R61 ≤ -15mm, and the radius of curvature R62 of the exit surface satisfies -90mm ≤ R62 ≤ -85mm; the radius of curvature R71 of the incident surface of the seventh lens G7 satisfies -90mm ≤ R71 ≤ -85mm, and the radius of curvature R72 of the exit surface satisfies -25mm ≤ R72 ≤ -20mm; the radius of curvature R81 of the incident surface of the eighth lens G8 satisfies -135mm ≤ R81 ≤ -130mm, and the radius of curvature R62 of the exit surface satisfies -20mm ≤ R61 ≤ -15mm. The radius of curvature R82 of the incident surface of the ninth lens G9 satisfies -30mm≤R82≤-25mm; the radius of curvature R91 of the incident surface of the ninth lens G9 satisfies 280mm≤R91≤285mm, and the radius of curvature R92 of the exit surface satisfies -135mm≤R92≤-130mm; the radius of curvature R101 of the incident surface of the tenth lens G10 satisfies 45mm≤R101≤50mm, and the radius of curvature R102 of the exit surface satisfies 105mm≤R102≤110mm.

[0123] Among them, the radius of curvature R61 of the incident surface of the sixth lens G6 and the radius of curvature R72 of the exit surface of the seventh lens G7 satisfy 0.6 < R61 / R72 < 1.

[0124] In this embodiment, the center thickness GT1 of the first lens G1 satisfies 3mm ≤ GT1 ≤ 6mm; the center thickness GT2 of the second lens G2 satisfies 3mm ≤ GT2 ≤ 6mm; the center thickness GT3 of the third lens G3 satisfies 4mm ≤ GT3 ≤ 7mm; the center thickness GT4 of the fourth lens G4 satisfies 4mm ≤ GT4 ≤ 7mm; the center thickness GT5 of the fifth lens G5 satisfies 1mm ≤ GT5 ≤ 4mm; the center thickness GT6 of the sixth lens G6 satisfies 3mm ≤ GT6 ≤ 6mm; the center thickness GT7 of the seventh lens G7 satisfies 4mm ≤ GT7 ≤ 7mm; the center thickness GT8 of the eighth lens G8 satisfies 4mm ≤ GT8 ≤ 7mm; the center thickness GT9 of the ninth lens G9 satisfies 3mm ≤ GT9 ≤ 6mm; and the center thickness GT10 of the tenth lens G10 satisfies 3mm ≤ GT10 ≤ 6mm. Here, center thickness refers to the dimension of the lens center along the optical axis.

[0125] Among them, the center thickness GT6 of the sixth lens G6 and the center thickness GT7 of the seventh lens G7 satisfy 0.4 < GT6 / GT7 < 1.5.

[0126] In this embodiment, the air gap AT1 between the first lens G1 and the second lens G2 along the optical axis satisfies 0mm ≤ AT1 ≤ 2mm; the air gap AT2 between the second lens G2 and the third lens G3 along the optical axis satisfies 2mm ≤ AT2 ≤ 4mm; the air gap AT3 between the third lens G3 and the fourth lens G4 along the optical axis satisfies 1mm ≤ AT3 ≤ 3mm; the air gap AT4 between the fourth lens G4 and the fifth lens G5 along the optical axis satisfies 2mm ≤ AT4 ≤ 4mm; and the air gap AT4 between the fifth lens G5 and the sixth lens G6 along the optical axis satisfies 2mm ≤ AT4 ≤ 4mm. The air gap distance AT5 satisfies 14mm≤AT5≤16mm; the air gap distance AT6 between the seventh lens G7 and the eighth lens G8 along the optical axis satisfies 0mm≤AT6≤2mm; the air gap distance AT7 between the eighth lens G8 and the ninth lens G9 along the optical axis satisfies 0mm≤AT7≤2mm; the air gap distance AT8 between the ninth lens G9 and the tenth lens G10 along the optical axis satisfies 0mm≤AT8≤2mm; and the air gap distance AT9 between the tenth lens G10 and the optical wedge along the optical axis satisfies 44mm≤AT9≤46mm.

[0127] In this embodiment of the present disclosure, the air gap distance AT9 between the tenth lens G10 and the optical wedge 10 along the optical axis and the air gap distance BFL between the optical wedge and the photosensitive surface of the photosensitive chip along the optical axis satisfy 7.3 < AT9 / BFL < 11.5.

[0128] The air gap distance BFL between the photosensitive surfaces of the optical wedge 10 and the photosensitive chip 20 along the optical axis satisfies 0.03 < BFL / TTL < 0.06 with the total optical length TTL of the Sham optical system.

[0129] In this embodiment, the focal length f1 of the first lens G1 satisfies 50mm≤f1≤60mm; the focal length f2 of the second lens G2 satisfies 60mm≤f2≤70mm; the focal length f3 of the third lens G3 satisfies -230mm≤f3≤-220mm; the focal length f4 of the fourth lens G4 satisfies 580mm≤f4≤590mm; the focal length f5 of the fifth lens G5 satisfies -30mm≤f5≤-20mm; the focal length f6 of the sixth lens G6 satisfies -20mm≤f6≤-10mm; the focal length f7 of the seventh lens G7 satisfies 30mm≤f7≤40mm; the focal length f8 of the eighth lens G8 satisfies 50mm≤f8≤60mm; the focal length f9 of the ninth lens G9 satisfies 100mm≤f9≤110mm; and the focal length f10 of the tenth lens G10 satisfies 110mm≤f10≤120mm.

[0130] In this embodiment, the focal length f1 of the first lens G1 and the focal length f of the SAM lens satisfy 0.6 < f1 / f < 0.9; the focal length f2 of the second lens G2 and the focal length f of the SAM lens satisfy 0.7 < f2 / f < 1; the focal length f3 of the third lens G3 and the focal length f of the SAM lens satisfy 2.7 < |f3 / f| < 3.3; the focal length f4 of the fourth lens G4 and the focal length f of the SAM lens satisfy 7.2 < f4 / f < 8.5; and the focal length f5 of the fifth lens G5 and the focal length f of the SAM lens satisfy 0.2 < |f5 / f| < 0. 0.5; The focal length f6 of the sixth lens G6 and the focal length f of the Sham lens satisfy 0.1 < |f6 / f| < 0.3; The focal length f7 of the seventh lens G7 and the focal length f of the Sham lens satisfy 0.3 < f7 / f < 0.6; The focal length f8 of the eighth lens G8 and the focal length f of the Sham lens satisfy 0.6 < f8 / f < 0.9; The focal length f9 of the ninth lens G9 and the focal length f of the Sham lens satisfy 1.2 < f9 / f < 1.6; The focal length f10 of the tenth lens G10 and the focal length f of the Sham lens satisfy 1.3 < f10 / f < 1.8.

[0131] In this embodiment, the refractive index N1 of the first lens G1 satisfies 1.6 ≤ N1 ≤ 1.7, and the Abbe number V1 satisfies 65 ≤ V1 ≤ 70; the refractive index N2 of the second lens G2 satisfies 1.6 ≤ N2 ≤ 1.7, and the Abbe number V2 satisfies 55 ≤ V2 ≤ 60; the refractive index N3 of the third lens G3 satisfies 1.6 ≤ N3 ≤ 1.7, and the Abbe number V3 satisfies 30 ≤ V3 ≤ 35; the refractive index N4 of the fourth lens G4 satisfies 1.7 ≤ N4 ≤ 1.8, and the Abbe number V4 satisfies 50 ≤ V4 ≤ 55; the refractive index N5 of the fifth lens G5 satisfies 1.8 ≤ N5 ≤ 1.9, and the Abbe number V5 satisfies 45 ≤ V5 ≤ 5. 0; The refractive index N6 of the sixth lens G6 satisfies 1.8≤N6≤1.9, and the Abbe number V6 satisfies 25≤V6≤30; the refractive index N7 of the seventh lens G7 satisfies 1.5≤N7≤1.6, and the Abbe number V7 satisfies 60≤V7≤70; the refractive index N8 of the eighth lens G8 satisfies 1.6≤N8≤1.7, and the Abbe number V8 satisfies 45≤V8≤50; the refractive index N9 of the ninth lens G9 satisfies 1.8≤N9≤1.9, and the Abbe number V9 satisfies 45≤V9≤50; the refractive index N10 of the tenth lens G10 satisfies 1.6≤N10≤1.7, and the Abbe number V10 satisfies 55≤V10≤60. This embodiment of the present disclosure defines the material properties of each lens by limiting the refractive index and Abbe number of each lens.

[0132] Among them, the Abbe number V6 of the sixth lens G6 and the Abbe number V7 of the seventh lens G7 satisfy 30 < |V6 - V7| < 45.

[0133] Continue to refer to Figure 4 and Figure 5 The Sham lens structure of the present disclosure is simple and the lens has good machinability.

[0134] Figure 6 Field curvature diagram of the Schahm optical system provided in the embodiments of this disclosure; Figure 7 The distortion diagram of the Sham optical system provided in the embodiments of this disclosure.

[0135] Combination Figure 6 The field curvature diagram shown has the field of view on the vertical axis and micrometers on the horizontal axis. Solid and dashed lines represent the meridional and sagittal components of the field curvature at different wavelengths within the working band. Solid lines represent the meridional component, which is perpendicular to the optical axis; dashed lines represent the sagittal component, which is along the optical axis. The SAM lens of this disclosure has a field curvature value of less than 0.05 mm across the entire field of view, ensuring consistent imaging between the center and edges of the field of view.

[0136] Combination Figure 7The distortion diagram is shown, with the vertical axis representing the field of view and the horizontal axis representing the distortion value. Each curve represents the distortion value at different wavelengths within the working band range, and the distortion value is less than 0.05%, which ensures that the entire image has minimal distortion, thereby guaranteeing the realism of the image.

[0137] Combination Figure 8 The MTF curve is plotted, with the horizontal axis representing spatial frequency in line pairs per millimeter (lp / mm) and the vertical axis representing contrast in the range of 0-1. Solid and dashed lines represent the meridional and sagittal components of the MTF at different fields of view. The solid line represents the contrast component in the meridional direction, perpendicular to the optical axis; the dashed line represents the contrast component in the sagittal direction, along the optical axis. The interval between the solid and dashed lines is minimal, and the contrast ratio is greater than 0.5 at 110 lp / mm across the entire field of view. This indicates that the lens exhibits high resolution and contrast after the addition of the optical wedge 10.

[0138] Therefore, the SAM optical system of this disclosure optimizes image quality by setting an optical wedge 10 to correct astigmatism, so that the SAM optical path can have the characteristics of high resolution and low distortion while meeting the requirements of near working distance and high magnification.

[0139] Example 3

[0140] Figure 9 Another schematic diagram of the Sham optical system provided in an embodiment of this disclosure.

[0141] The difference between the SAM optical system in this embodiment and the three SAM optical systems in the embodiments lies in the different SAM lens structures. However, the parameters of the SAM lens in this embodiment and the three SAM lenses in the embodiments all meet the ranges shown in Tables 1 and 2. The following is a detailed explanation... Figure 9 The structure of the Sham lens in the embodiments of this disclosure is described in detail.

[0142] In some embodiments, the working distance WD of the Sham lens satisfies 30mm≤WD≤60mm, the magnification PMAG satisfies 0.6≤PMAG≤0.7; the focal length f of the Sham lens satisfies 35mm≤f≤45mm; the aperture number Fno satisfies F2.1≤Fno≤F2.4; the working wavelength WL satisfies 380mm≤WL≤450mm, and the Sham angle α satisfies 40°≤α≤45°.

[0143] The focal length f of the SAM lens and the target surface size IMG of the image sensor 20 satisfy 1.9 < f / IMG < 4.

[0144] like Figure 9As shown, the SAM lens of this embodiment includes a first lens G1, a second lens G2, a third lens G3, a fourth lens G4, a fifth lens G5, a sixth lens G6, a seventh lens G7, an eighth lens G8, and a ninth lens G9 arranged coaxially from the object side to the image side; the first lens G1 is the lens closest to the object side.

[0145] The third lens G3 and the fourth lens G4 are cemented lenses, and the fifth lens G5 and the sixth lens G6 are cemented lenses; an aperture stop is provided between the fourth lens G4 and the fifth lens G5.

[0146] The first lens G1, the second lens G2, the third lens G3 and the fourth lens G4 form the front lens group 31; the fifth lens G5, the sixth lens G6, the seventh lens G7, the eighth lens G8 and the ninth lens G9 form the rear lens group 32.

[0147] The focal length fa of the front lens group 31 satisfies 25mm≤fa≤35mm, and the focal length fb of the rear lens group 32 satisfies 20mm≤fb≤30mm.

[0148] The axial distance d12 between the front lens group 31 and the rear lens group 32 satisfies 6mm≤d12≤8mm, and the axial distance d23 between the rear lens group 32 and the optical wedge 10 satisfies 27mm≤d23≤29mm.

[0149] The focal length fa of the front lens group 31 and the focal length f of the Sham lens satisfy 0.5 < fa / f < 1; the focal length fb of the rear lens group 32 and the focal length f of the Sham lens satisfy 0.4 < fb / f < 1.2; the axial distance d12 between the front lens group 31 and the rear lens group 32 and the axial distance d23 between the rear lens group 32 and the optical wedge 10 satisfy 0.2 < d12 / d23 < 0.3.

[0150] In this embodiment of the present disclosure, the first lens G1 is a biconvex lens, the second lens G2 is a convex-concave lens, the third lens G3 is a convex-concave lens, the fourth lens G4 is a convex-concave lens, the fifth lens G5 is a concave-convex lens, the sixth lens G6 is a concave-convex lens, the seventh lens G7 is a concave-convex lens, the eighth lens G8 is a biconvex lens, and the ninth lens G9 is a convex-planar lens.

[0151] In the embodiments disclosed herein, each lens or lens group has its own unique functional focus, resulting in superior parameters for the Sham lens.

[0152] In the Sham lens of this disclosure, the difference between the number of lenses in the front lens group 31 and the number of lenses in the rear lens group 32 is 0 to 1, and the numbers are approximately symmetrical, which helps to reduce the optical distortion of the Sham optical system.

[0153] The aperture stop 33 is located on the exit surface of the last lens of the front lens group 31, or it can be located between the front lens group 31 and the rear lens group 32. Both can effectively control the light and help eliminate coma.

[0154] In the front lens group 31 of this embodiment, the first lens G1 and the second lens G2 have positive optical power, which can converge the off-axis beam with a large angle caused by the near working distance while correcting spherical aberration; the third lens G3 and the fourth lens G4, through the combination of positive and negative optical power, can quickly achieve the deflection of the light angle, reduce the angle between the beam and the optical axis, and thus reduce spherical aberration. At the same time, it can also expand the optical path, enabling the system to meet the application requirements of larger imaging target surfaces.

[0155] In the rear lens group 32 of this embodiment, the fifth lens G5 and the sixth lens G6 are cemented lenses, and the difference in Abbe number between the fifth lens G5 and the sixth lens G6 is greater than 35, further eliminating chromatic aberration generated in the previous optical path and correcting chromatic aberration for the beam converging on the image plane. The seventh lens G7, the eighth lens G8, and the ninth lens G9 each have positive optical power, reducing the incident angle of the principal ray on the image plane, thereby balancing field curvature and off-axis aberrations.

[0156] Regarding the aforementioned SAM lens, in some possible implementations, in this embodiment of the present disclosure, an optical wedge 10 is provided. The incident surface of the optical wedge 10 is perpendicular to the optical axis, and the exit surface of the optical wedge 10 is inclined relative to the normal plane of the optical axis. The preset angle A1 between the incident and exit surfaces of the optical wedge 10 satisfies 0° < A1 ≤ 2°. The preset angle A1 of the optical wedge 10 is small, making the optical wedge 10 a weak optical wedge. Under the action of the optical wedge 10, astigmatism caused by the angle between the photosensitive surface of the photosensitive chip 20 and the optical axis of the lens is corrected.

[0157] In this embodiment, the optical wedge 10 also has the following characteristics: the center thickness CT0 of the optical wedge 10 satisfies 1mm≤CT0≤4mm; the air gap distance BFL between the optical wedge 10 and the photosensitive surface of the photosensitive chip 20 along the optical axis satisfies 7mm≤BFL≤9mm; the refractive index N0 of the optical wedge 10 satisfies 1.5≤N0≤1.6, and the Abbe number V0 satisfies 60≤V0≤65.

[0158] Therefore, through the above-described SAM lens design and optical wedge 10 design of the embodiments of this disclosure, the SAM optical system can effectively balance and process various aberrations under conditions of close working distance and high magnification, thereby improving the imaging performance of the SAM optical system.

[0159] The following section introduces the optical parameters of each lens, such as radius of curvature, focal length, and center thickness.

[0160] In this embodiment, the radius of curvature R11 of the incident surface of the first lens G1 satisfies 45mm≤R11≤50mm, and the radius of curvature R12 of the exit surface satisfies -100mm≤R12≤-95mm; the radius of curvature R21 of the incident surface of the second lens G2 satisfies 5mm≤R21≤10mm, and the radius of curvature R22 of the exit surface satisfies 10mm≤R22≤15mm; the radius of curvature R31 of the incident surface of the third lens G3 satisfies 10mm≤R31≤15mm, and the radius of curvature R32 of the exit surface satisfies 5mm≤R32≤10mm; the radius of curvature R41 of the incident surface of the fourth lens G4 satisfies 5mm≤R41≤10mm, and the radius of curvature R42 of the exit surface satisfies 10mm≤R42≤15mm; the radius of curvature R51 of the incident surface of the fifth lens G5 satisfies -15mm≤R5 The radius of curvature of the incident surface of the sixth lens G6 is -40mm≤R52≤-35mm, and the radius of curvature of the exit surface R62 is -15mm≤R62≤-10mm; the radius of curvature of the incident surface of the seventh lens G7 is -40mm≤R71≤-35mm, and the radius of curvature of the exit surface R72 is -25mm≤R72≤-20mm; the radius of curvature of the incident surface of the eighth lens G8 is 90mm≤R81≤100mm, and the radius of curvature of the exit surface R82 is -55mm≤R82≤-50mm; the radius of curvature of the incident surface of the ninth lens G9 is 50mm≤R91≤55mm, and the radius of curvature of the exit surface R92 is infinite.

[0161] Among them, the radius of curvature R31 of the incident surface of the third lens G3 and the radius of curvature R42 of the exit surface of the fourth lens G4 satisfy 0.6 < R31 / R42 < 1.5; the radius of curvature R51 of the incident surface of the fifth lens G5 and the radius of curvature R62 of the exit surface of the sixth lens G6 satisfy 0.6 < R51 / R62 < 1.5.

[0162] In this embodiment, the center thickness GT1 of the first lens G1 satisfies 2mm ≤ GT1 ≤ 5mm; the center thickness GT2 of the second lens G2 satisfies 2mm ≤ GT2 ≤ 5mm; the center thickness GT3 of the third lens G3 satisfies 3mm ≤ GT3 ≤ 6mm; the center thickness GT4 of the fourth lens G4 satisfies 2mm ≤ GT4 ≤ 5mm; the center thickness GT5 of the fifth lens G5 satisfies 3mm ≤ GT5 ≤ 6mm; the center thickness GT6 of the sixth lens G6 satisfies 3mm ≤ GT6 ≤ 6mm; the center thickness GT7 of the seventh lens G7 satisfies 2mm ≤ GT7 ≤ 5mm; the center thickness GT8 of the eighth lens G8 satisfies 3mm ≤ GT8 ≤ 6mm; the center thickness GT9 of the ninth lens G9 satisfies 2mm ≤ GT9 ≤ 5mm; and the air gap BFL between the optical wedge 10 and the photosensitive surface of the photosensitive chip 20 along the optical axis satisfies 7mm ≤ BFL ≤ 9mm. Here, center thickness refers to the dimension of the lens center along the optical axis.

[0163] Among them, the center thickness GT3 of the third lens G3 and the center thickness GT4 of the fourth lens G4 satisfy 0.6 < GT3 / GT4 < 3; the center thickness of the fifth lens G5 and the center thickness GT6 of the sixth lens G6 satisfy 0.5 < GT5 / GT6 < 2.

[0164] In this embodiment, the air gap AT1 between the first lens G1 and the second lens G2 along the optical axis satisfies 0mm ≤ AT1 ≤ 2mm; the air gap AT2 between the second lens G2 and the third lens G3 along the optical axis satisfies 1mm ≤ AT2 ≤ 3mm; the third lens G3 and the fourth lens G4 are cemented lenses; the air gap AT3 between the fourth lens G4 and the aperture stop along the optical axis satisfies 0mm ≤ AT3 ≤ 2mm; and the air gap AT4 between the aperture stop and the fifth lens G5 along the optical axis satisfies 5mm ≤ AT4 ≤ 7mm; the fifth lens G5 and the sixth lens G6 are cemented lenses; the air gap AT5 between the sixth lens G6 and the seventh lens G7 along the optical axis satisfies 2mm≤AT5≤4mm; the air gap AT6 between the seventh lens G7 and the eighth lens G8 along the optical axis satisfies 0mm≤AT6≤2mm; the air gap AT7 between the eighth lens G8 and the ninth lens G9 along the optical axis satisfies 0mm≤AT8≤2mm; the air gap AT8 between the ninth lens G9 and the optical wedge 10 along the optical axis satisfies 17mm≤AT8≤19mm.

[0165] The air gap distance AT8 between the ninth lens G9 and the optical wedge 10 along the optical axis and the air gap distance BFL between the photosensitive surface of the optical wedge 10 and the photosensitive chip 20 along the optical axis satisfy 1.8 < AT8 / BFL < 2.8.

[0166] The air gap distance BFL between the photosensitive surfaces of the optical wedge 10 and the photosensitive chip 20 along the optical axis satisfies 0.08 < BFL / TTL < 0.2 with respect to the total optical length TTL of the Sham optical system.

[0167] In this embodiment, the focal length f1 of the first lens G1 satisfies 30mm≤f1≤40mm; the focal length f2 of the second lens G2 satisfies 135mm≤f2≤145mm; the focal length f3 of the third lens G3 satisfies 25mm≤f3≤35mm; the focal length f4 of the fourth lens G4 satisfies -20mm≤f4≤-10mm; the focal length f5 of the fifth lens G5 satisfies -15mm≤f5≤-5mm; the focal length f6 of the sixth lens G6 satisfies 15mm≤f6≤25mm; the focal length f7 of the seventh lens G7 satisfies 70mm≤f7≤80mm; the focal length f8 of the eighth lens G8 satisfies 40mm≤f8≤50mm; and the focal length f9 of the ninth lens G9 satisfies 60mm≤f9≤70mm.

[0168] In this embodiment, the focal length f1 of the first lens G1 and the focal length f of the Sham lens satisfy 0.6 < f1 / f < 1.2; the focal length f2 of the second lens G2 and the focal length f of the Sham lens satisfy 3 < f2 / f < 4.2; the focal length f3 of the third lens G3 and the focal length f of the Sham lens satisfy 0.5 < f3 / f < 1; the focal length f4 of the fourth lens G4 and the focal length f of the Sham lens satisfy 0.2 < |f4 / f| < 0.6; the focal length f5 of the fifth lens G5 ...0.6 < f1 / f < 1.2; the focal length f2 of the second lens G2 and the focal length f of the Sham lens satisfy 0.6 < f1 / f < 1.2; the focal length f2 of the third lens G3 and the focal length f of the Sham lens satisfy 0.6 < f1 / f < 1.2; the focal length f4 of the fourth lens G4 and the focal length f of the Sham lens satisfy 0.2 < |f4 / f| < 0.6; the focal length f5 of the fifth lens G5 and the focal length f5 of the Sham lens satisfy 0.6 < The focal lengths f of the first lens G6 and the second lens G7 satisfy the following conditions: 0.1 < |f5 / f| < 0.5; 0.3 < f6 / f < 0.8; 1.5 < f7 / f < 2.3; 0.8 < f8 / f < 1.5; and 1.3 < f9 / f < 2.0.

[0169] In this embodiment, the refractive index N1 of the first lens G1 satisfies 1.8 ≤ N1 ≤ 1.9, and the Abbe number V1 satisfies 45 ≤ V1 ≤ 50; the refractive index N2 of the second lens G2 satisfies 1.5 ≤ N2 ≤ 1.6, and the Abbe number V2 satisfies 55 ≤ V2 ≤ 60; the refractive index N3 of the third lens G3 satisfies 1.8 ≤ N3 ≤ 1.9, and the Abbe number V3 satisfies 30 ≤ V3 ≤ 35; the refractive index N4 of the fourth lens G4 satisfies 1.5 ≤ N4 ≤ 1.6, and the Abbe number V4 satisfies 55 ≤ V4 ≤ 60; and the refractive index N5 of the fifth lens G5 satisfies 1. The refractive index of the sixth lens G6 is 1.5 ≤ N5 ≤ 1.6, and the Abbe number V5 satisfies 25 ≤ V5 ≤ 30; the refractive index of the seventh lens G7 is 1.8 ≤ N7 ≤ 1.9, and the Abbe number V7 satisfies 45 ≤ V7 ≤ 50; the refractive index of the eighth lens G8 is 1.6 ≤ N8 ≤ 1.7, and the Abbe number V8 satisfies 55 ≤ V8 ≤ 60; the refractive index of the ninth lens G9 is 1.7 ≤ N9 ≤ 1.8, and the Abbe number V9 satisfies 40 ≤ V9 ≤ 45.

[0170] Among them, the Abbe number V3 of the third lens G3 and the Abbe number V4 of the fourth lens G4 satisfy 20 < |V3-V4| < 30; the Abbe number V5 of the fifth lens G5 and the Abbe number V6 of the sixth lens G6 satisfy 35 < |V5-V6| < 45.

[0171] Example 4

[0172] This disclosure also provides an electronic device, which includes the sensor module of Embodiment 1, or the Sham optical system of Embodiments 2 to 3.

[0173] In some embodiments, the electronic device is a 3D camera. Line laser profilometry is a technique that uses a laser source to emit a line laser and illuminate the surface of the target to be measured. The 3D camera determines the contour of the target surface by obtaining the laser reflected back from the target surface. It has the advantages of high accuracy, high speed, and high stability.

[0174] The sensor module or SAM optical system provided in this embodiment has the same structure, function and effect as the above embodiments. For details, please refer to the above embodiments, and will not be repeated here.

[0175] In the above description, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0176] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A sensor module applied to a SAM optical path, characterized in that, The sensor module includes an optical wedge and a photosensitive chip. The optical wedge is encapsulated on one side of the photosensitive surface of the photosensitive chip, and light is imaged onto the photosensitive surface of the photosensitive chip via the optical wedge. The incident surface and the exit surface of the optical wedge are both planar, and there is a preset angle between the incident surface and the exit surface of the optical wedge. One of the incident surface and the exit surface of the optical wedge is perpendicular to the optical axis of the Sham optical path, and the preset angle A1 between the incident surface and the exit surface of the optical wedge satisfies 0°<A1≤2°. The distance between the incident surface and the exit surface of the optical wedge is the thickness of the optical wedge, and the thickness of the optical wedge gradually increases or decreases along a preset direction.

2. The sensor module according to claim 1, characterized in that, Multiple optical wedges are provided, and the multiple optical wedges are arranged sequentially along the optical axis of the Sham optical path. The multiple optical wedges have the same refractive index. The sum of the thicknesses of the multiple optical wedges gradually increases or decreases along the preset direction.

3. The sensor module according to claim 1, characterized in that, Multiple optical wedges are provided, and the multiple optical wedges are arranged sequentially along the optical axis of the Sham optical path. At least one of the optical wedges has a different refractive index than the other optical wedges, so that the meridional component and sagittal component dv of the contrast of each field of view MTF at 110 lp / mm satisfies 0 ≤ dv ≤ 0.

1.

4. A Schahm optical system, characterized in that, It includes a Sham lens and an optical wedge arranged sequentially from the object side to the image side along the optical axis; the object-side light rays pass sequentially through the Sham lens and the optical wedge; The incident surface and the exit surface of the light wedge are both planes, and there is a preset angle between the incident surface and the exit surface of the light wedge; One of the incident surface and the exit surface of the optical wedge is perpendicular to the optical axis, and the preset angle A1 between the incident surface and the exit surface of the optical wedge satisfies 0°<A1≤2°. The distance between the incident surface and the exit surface of the optical wedge is the thickness of the optical wedge, and the thickness of the optical wedge gradually increases or decreases along a preset direction.

5. The Schamm optical system according to claim 4, characterized in that, The optical wedge is encapsulated on the light-emitting side of the Sham lens; or, The SAM optical system also includes a photosensitive chip. Object-side light passes sequentially through the SAM lens and the optical wedge to image onto the photosensitive chip. The optical wedge is encapsulated on the light-incident side of the photosensitive chip, and the optical wedge and the photosensitive chip form an image sensor.

6. The Schamm optical system according to claim 4, characterized in that, Multiple optical wedges are provided, and the multiple optical wedges are arranged sequentially along the optical axis. The multiple optical wedges have the same refractive index. The sum of the thicknesses of the multiple optical wedges gradually increases or gradually decreases along the preset direction.

7. The Schamm optical system according to claim 4, characterized in that, Multiple optical wedges are provided, and the multiple optical wedges are arranged sequentially along the optical axis. The refractive index of at least one optical wedge is different from that of the other optical wedges, so that the dv of the meridional component and the sagittal component of the contrast of each field of view MTF at 110 lp / mm satisfies 0 ≤ dv ≤ 0.

1.

8. The Schamm optical system according to any one of claims 4-7, characterized in that, The focal length f of the Sham lens satisfies 25mm≤f≤90mm, the aperture number Fno satisfies F1.7≤Fno≤F2.6, the field of view FOV satisfies 10mm≤FOV≤30mm, the magnification PMAG satisfies 0.5≤PMAG≤0.8, and the Sham angle α satisfies 30°≤α≤48°.

9. The Schamm optical system according to any one of claims 4-7, characterized in that, The SAM lens includes a front lens group and a rear lens group arranged coaxially from the object side to the image side. The focal length fa of the front lens group satisfies 20mm≤fa≤85mm, and the focal length fb of the rear lens group satisfies 15mm≤fb≤45mm. The axial distance d12 between the front lens group and the rear lens group satisfies 4mm≤d12≤18mm, and the axial distance d23 between the rear lens group and the optical wedge satisfies 20mm≤d23≤48mm.

10. The Schamm optical system according to any one of claims 4-7, characterized in that, The SAM lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens arranged coaxially from the object side to the image side; the sixth lens and the seventh lens are cemented lenses; Wherein, the first lens is a biconvex lens, the second lens is a convex-planar lens, the third lens is a concave-convex lens, the fourth lens is a convex-concave lens, the fifth lens is a biconcave lens, the sixth lens is a concave-convex lens, the seventh lens is a concave-convex lens, the eighth lens is a concave-convex lens, the ninth lens is a biconvex lens, and the tenth lens is a convex-concave lens.

11. The Schamm optical system according to claim 10, characterized in that, The first and second lenses have positive optical power, the third lens has negative optical power, the fourth lens has positive optical power, the fifth lens has negative optical power, the difference in Abbe number between the sixth and seventh lenses is greater than 35, and the eighth, ninth, and tenth lenses each have positive optical power.

12. The Schahm optical system according to claim 10, characterized in that, One optical wedge is provided, and the center thickness CT0 of the optical wedge satisfies 1mm≤CT0≤4mm; A photosensitive chip is provided on the light-emitting side of the light wedge, and the air gap distance BFL between the light wedge and the photosensitive surface of the photosensitive chip along the optical axis satisfies 4mm≤BFL≤6mm. The refractive index N0 of the optical wedge satisfies 1.5≤N0≤1.6, and the Abbe number V0 satisfies 60≤V0≤65.

13. The Schahm optical system according to claim 10, characterized in that, The radius of curvature R11 of the incident surface of the first lens satisfies 60mm ≤ R11 ≤ 65mm, and the radius of curvature R12 of the exit surface satisfies -80mm ≤ R12 ≤ -75mm; the radius of curvature R21 of the incident surface of the second lens satisfies 45mm ≤ R21 ≤ 50mm, and the radius of curvature R22 of the exit surface is infinite; the radius of curvature R31 of the incident surface of the third lens satisfies -115mm ≤ R31 ≤ -110mm, and the radius of curvature R22 of the exit surface is infinite. R32 satisfies -350mm ≤ R32 ≤ -345mm; the radius of curvature R41 of the incident surface of the fourth lens satisfies 25mm ≤ R41 ≤ 30mm, and the radius of curvature R42 of the exit surface satisfies 25mm ≤ R42 ≤ 30mm; the radius of curvature R51 of the incident surface of the fifth lens satisfies -120mm ≤ R51 ≤ -115mm, and the radius of curvature R52 of the exit surface satisfies 20mm ≤ R52 ≤ 25mm; the radius of curvature R32 of the incident surface of the sixth lens satisfies -350mm ≤ R32 ≤ -345mm. The radius of curvature R61 of the seventh lens satisfies -20mm ≤ R61 ≤ -15mm, and the radius of curvature R62 of the exit surface satisfies -90mm ≤ R62 ≤ -85mm; the radius of curvature R71 of the incident surface of the seventh lens satisfies -90mm ≤ R71 ≤ -85mm, and the radius of curvature R72 of the exit surface satisfies -25mm ≤ R72 ≤ -20mm; the radius of curvature R81 of the incident surface of the eighth lens satisfies -135mm ≤ R81 ≤ -130mm, and the radius of curvature R62 of the exit surface satisfies -25mm ≤ R72 ≤ -20mm; The radius of curvature R82 of the ninth lens satisfies -30mm≤R82≤-25mm; the radius of curvature R91 of the incident surface of the ninth lens satisfies 280mm≤R91≤285mm, and the radius of curvature R92 of the exit surface satisfies -135mm≤R92≤-130mm; the radius of curvature R101 of the incident surface of the tenth lens satisfies 45mm≤R101≤50mm, and the radius of curvature R102 of the exit surface satisfies 105mm≤R102≤110mm.

14. The Schamm optical system according to claim 10, characterized in that, The center thickness GT1 of the first lens satisfies 3mm ≤ GT1 ≤ 6mm; the center thickness GT2 of the second lens satisfies 3mm ≤ GT2 ≤ 6mm; the center thickness GT3 of the third lens satisfies 4mm ≤ GT3 ≤ 7mm; the center thickness GT4 of the fourth lens satisfies 4mm ≤ GT4 ≤ 7mm; the center thickness GT5 of the fifth lens satisfies 1mm ≤ GT5 ≤ 4mm; the center thickness GT6 of the sixth lens satisfies 3mm ≤ GT6 ≤ 6mm; the center thickness GT7 of the seventh lens satisfies 4mm ≤ GT7 ≤ 7mm; the center thickness GT8 of the eighth lens satisfies 4mm ≤ GT8 ≤ 7mm; the center thickness GT9 of the ninth lens satisfies 3mm ≤ GT9 ≤ 6mm; and the center thickness GT10 of the tenth lens satisfies 3mm ≤ GT10 ≤ 6mm.

15. The Schamm optical system according to claim 10, characterized in that, The air gap distance AT1 between the first lens and the second lens along the optical axis satisfies 0mm≤AT1≤2mm; the air gap distance AT2 between the second lens and the third lens along the optical axis satisfies 2mm≤AT2≤4mm; the air gap distance AT3 between the third lens and the fourth lens along the optical axis satisfies 1mm≤AT3≤3mm; the air gap distance AT4 between the fourth lens and the fifth lens along the optical axis satisfies 2mm≤AT4≤4mm; the air gap distance AT5 between the fifth lens and the sixth lens along the optical axis satisfies 14mm≤AT5≤16mm; the air gap distance AT6 between the seventh lens and the eighth lens along the optical axis satisfies 0mm≤AT6≤2mm; the air gap distance AT7 between the eighth lens and the ninth lens along the optical axis satisfies 0mm≤AT7≤2mm; the air gap distance AT8 between the ninth lens and the tenth lens along the optical axis satisfies 0mm≤AT8≤2mm; and the air gap distance AT9 between the tenth lens and the optical wedge along the optical axis satisfies 44mm≤AT9≤46mm.

16. The Schamm optical system according to claim 10, characterized in that, A photosensitive chip is provided on the light-emitting side of the optical wedge; the air gap distance AT9 between the tenth lens and the optical wedge along the optical axis and the air gap distance BFL between the photosensitive surfaces of the optical wedge and the photosensitive chip along the optical axis satisfy 7.3 < AT9 / BFL < 11.

5. The air gap distance BFL between the optical wedge and the photosensitive surface of the photosensitive chip along the optical axis satisfies 0.03 < BFL / TTL < 0.06 with the total optical length TTL of the Sham optical system.

17. The Schamm optical system according to claim 10, characterized in that, The focal length f1 of the first lens satisfies 50mm≤f1≤60mm; the focal length f2 of the second lens satisfies 60mm≤f2≤70mm; the focal length f3 of the third lens satisfies -230mm≤f3≤-220mm; the focal length f4 of the fourth lens satisfies 580mm≤f4≤590mm; the focal length f5 of the fifth lens satisfies -30mm≤f5≤-20mm; the focal length f6 of the sixth lens satisfies -20mm≤f6≤-10mm; the focal length f7 of the seventh lens satisfies 30mm≤f7≤40mm; the focal length f8 of the eighth lens satisfies 50mm≤f8≤60mm; the focal length f9 of the ninth lens satisfies 100mm≤f9≤110mm; and the focal length f10 of the tenth lens satisfies 110mm≤f10≤120mm.

18. The Schamm optical system according to claim 10, characterized in that, The focal length f1 of the first lens and the focal length f of the Sham lens satisfy 0.6 < f1 / f < 0.9; the focal length f2 of the second lens and the focal length f of the Sham lens satisfy 0.7 < f2 / f < 1; the focal length f3 of the third lens and the focal length f of the Sham lens satisfy 2.7 < |f3 / f| < 3.3; the focal length f4 of the fourth lens and the focal length f of the Sham lens satisfy 7.2 < f4 / f < 8.5; the focal length f5 of the fifth lens and the focal length f of the Sham lens satisfy 0.2 < |f5 / f| < 0.5; The focal length f6 of the sixth lens and the focal length f of the Sham lens satisfy 0.1 < |f6 / f| < 0.3; the focal length f7 of the seventh lens and the focal length f of the Sham lens satisfy 0.3 < f7 / f < 0.6; the focal length f8 of the eighth lens and the focal length f of the Sham lens satisfy 0.6 < f8 / f < 0.9; the focal length f9 of the ninth lens and the focal length f of the Sham lens satisfy 1.2 < f9 / f < 1.6; the focal length f10 of the tenth lens and the focal length f of the Sham lens satisfy 1.3 < f10 / f < 1.

8.

19. The Schahm optical system according to claim 10, characterized in that, The first lens has a refractive index N1 satisfying 1.6 ≤ N1 ≤ 1.7 and an Abbe number V1 satisfying 65 ≤ V1 ≤ 70; the second lens has a refractive index N2 satisfying 1.6 ≤ N2 ≤ 1.7 and an Abbe number V2 satisfying 55 ≤ V2 ≤ 60; the third lens has a refractive index N3 satisfying 1.6 ≤ N3 ≤ 1.7 and an Abbe number V3 satisfying 30 ≤ V3 ≤ 35; the fourth lens has a refractive index N4 satisfying 1.7 ≤ N4 ≤ 1.8 and an Abbe number V4 satisfying 50 ≤ V4 ≤ 55; the fifth lens has a refractive index N5 satisfying 1.8 ≤ N5 ≤ 1.9 and an Abbe number V5 satisfying 45 ≤ V5 ≤ 50; The refractive index N6 of the sixth lens satisfies 1.8≤N6≤1.9, and the Abbe number V6 satisfies 25≤V6≤30; the refractive index N7 of the seventh lens satisfies 1.5≤N7≤1.6, and the Abbe number V7 satisfies 60≤V7≤70; the refractive index N8 of the eighth lens satisfies 1.6≤N8≤1.7, and the Abbe number V8 satisfies 45≤V8≤50; the refractive index N9 of the ninth lens satisfies 1.8≤N9≤1.9, and the Abbe number V9 satisfies 45≤V9≤50; the refractive index N10 of the tenth lens satisfies 1.6≤N10≤1.7, and the Abbe number V10 satisfies 55≤V10≤60.

20. The Schahm optical system according to claim 10, characterized in that, The radius of curvature R61 of the incident surface of the sixth lens and the radius of curvature R72 of the exit surface of the seventh lens satisfy 0.6 < R61 / R72 < 1; The center thickness GT6 of the sixth lens and the center thickness GT7 of the seventh lens satisfy 0.4 < GT6 / GT7 < 1.5; The Abbe number V6 of the sixth lens and the Abbe number V7 of the seventh lens satisfy 30 < |V6-V7| < 45.

21. The Schahm optical system according to claim 10, characterized in that, The working distance WD of the Sham lens satisfies 60mm≤WD≤90mm, and the magnification PMAG satisfies 0.5≤PMAG≤0.6; the focal length f of the Sham lens satisfies 70mm≤f≤80mm; the aperture number Fno satisfies F1.8≤Fno≤F2.1; the working wavelength WL satisfies 380mm≤WL≤450mm, and the Sham angle α satisfies 33°≤α≤38°; a photosensitive chip is provided on the light-emitting side of the light wedge, and the focal length f of the Sham lens and the target surface size IMG of the photosensitive chip satisfy 3.5<f / IMG<8.

22. The Schahm optical system according to claim 10, characterized in that, The first lens, the second lens, the third lens, the fourth lens, and the fifth lens form the front lens group; the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens form the rear lens group. The focal length fa of the front lens group satisfies 70mm≤fa≤80mm, and the focal length fb of the rear lens group satisfies 25mm≤fb≤35mm. The axial distance d12 between the front lens group and the rear lens group satisfies 14mm≤d12≤16mm, and the axial distance d23 between the rear lens group and the optical wedge satisfies 43mm≤d23≤45mm.

23. The Schamm optical system according to claim 22, characterized in that, The focal length fa of the front lens group and the focal length f of the Sham lens satisfy 0.8 < fa / f < 1.2; the focal length fb of the rear lens group and the focal length f of the Sham lens satisfy 0.3 < fb / f < 0.5; the axial distance d12 between the front lens group and the rear lens group and the axial distance d23 between the rear lens group and the optical wedge satisfy 0.3 < d12 / d23 < 0.

4.

24. The Schamm optical system according to any one of claims 5-7, characterized in that, The SAM lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens arranged coaxially from the object side to the image side; the third lens and the fourth lens are cemented lenses, and the fifth lens and the sixth lens are cemented lenses; an aperture stop is provided between the fourth lens and the fifth lens; Wherein, the first lens is a biconvex lens, the second lens is a convex-concave lens, the third lens is a convex-concave lens, the fourth lens is a convex-concave lens, the fifth lens is a concave-convex lens, the sixth lens is a concave-convex lens, the seventh lens is a concave-convex lens, the eighth lens is a biconvex lens, and the ninth lens is a convex-planar lens.

25. The Schamm optical system according to claim 24, characterized in that, The first lens, the second lens, and the third lens have positive optical power, and the fourth lens has negative optical power; The difference in Abbe number between the fifth lens and the sixth lens is greater than 35, and the seventh lens, the eighth lens, and the ninth lens each have positive optical power.

26. The Schamm optical system according to claim 24, characterized in that, The radius of curvature R11 of the incident surface of the first lens satisfies 45mm ≤ R11 ≤ 50mm, and the radius of curvature R12 of the exit surface satisfies -100mm ≤ R12 ≤ -95mm; the radius of curvature R21 of the incident surface of the second lens satisfies 5mm ≤ R21 ≤ 10mm, and the radius of curvature R22 of the exit surface satisfies 10mm ≤ R22 ≤ 15mm; the radius of curvature R31 of the incident surface of the third lens satisfies 10mm ≤ R31 ≤ 15mm, and the radius of curvature R32 of the exit surface satisfies 5mm ≤ R32 ≤ 10mm; the radius of curvature R41 of the incident surface of the fourth lens satisfies 5mm ≤ R41 ≤ 10mm, and the radius of curvature R42 of the exit surface satisfies 10mm ≤ R42 ≤ 15mm; the radius of curvature R51 of the incident surface of the fifth lens satisfies -15mm ≤ R51 ≤ -1 The radius of curvature R52 of the exit surface of the sixth lens satisfies -40mm≤R52≤-35mm; the radius of curvature R61 of the incident surface of the seventh lens satisfies -40mm≤R61≤-35mm, and the radius of curvature R62 of the exit surface satisfies -15mm≤R62≤-10mm; the radius of curvature R71 of the incident surface of the seventh lens satisfies -40mm≤R71≤-35mm, and the radius of curvature R72 of the exit surface satisfies -25mm≤R72≤-20mm; the radius of curvature R81 of the incident surface of the eighth lens satisfies 90mm≤R81≤100mm, and the radius of curvature R82 of the exit surface satisfies -55mm≤R82≤-50mm; the radius of curvature R91 of the incident surface of the ninth lens satisfies 50mm≤R91≤55mm, and the radius of curvature R92 of the exit surface is infinite.

27. The Schamm optical system according to claim 24, characterized in that, The center thickness GT1 of the first lens satisfies 2mm≤GT1≤5mm; the center thickness GT2 of the second lens satisfies 2mm≤GT2≤5mm; the center thickness GT3 of the third lens satisfies 3mm≤GT3≤6mm; the center thickness GT4 of the fourth lens satisfies 2mm≤GT4≤5mm; the center thickness GT5 of the fifth lens satisfies 3mm≤GT5≤6mm; the center thickness GT6 of the sixth lens satisfies 3mm≤GT6≤6mm; the center thickness GT7 of the seventh lens satisfies 2mm≤GT7≤5mm; the center thickness GT8 of the eighth lens satisfies 3mm≤GT8≤6mm; the center thickness GT9 of the ninth lens satisfies 2mm≤GT9≤5mm; a photosensitive chip is provided on the light-emitting side of the light wedge, and the air gap distance BFL between the light-sensitive surface of the light wedge and the photosensitive surface of the photosensitive chip along the optical axis satisfies 7mm≤BFL≤9mm.

28. The Schamm optical system according to claim 24, characterized in that, The air gap AT1 between the first lens and the second lens along the optical axis satisfies 0mm ≤ AT1 ≤ 2mm; the air gap AT2 between the second lens and the third lens along the optical axis satisfies 1mm ≤ AT2 ≤ 3mm; the third lens and the fourth lens are cemented lenses; the air gap AT3 between the fourth lens and the aperture stop along the optical axis satisfies 0mm ≤ AT3 ≤ 2mm; the air gap AT4 between the aperture stop and the fifth lens along the optical axis satisfies 5mm ≤ AT4 ≤ 7mm; the fifth lens and the sixth lens are cemented lenses; the air gap AT5 between the sixth lens and the seventh lens along the optical axis satisfies 2mm ≤ AT5 ≤ 4mm; the air gap AT6 between the seventh lens and the eighth lens along the optical axis satisfies 0mm ≤ AT6 ≤ 2mm; the air gap AT7 between the eighth lens and the ninth lens along the optical axis satisfies 0mm ≤ AT8 ≤ 2mm; the air gap AT8 between the ninth lens and the optical wedge along the optical axis satisfies 17mm ≤ AT8 ≤ 19mm.

29. The Schamm optical system according to claim 24, characterized in that, A photosensitive chip is provided on the light-emitting side of the optical wedge, and the air gap distance AT8 between the ninth lens and the optical wedge along the optical axis and the air gap distance BFL between the photosensitive surfaces of the optical wedge and the photosensitive chip along the optical axis satisfy 1.8 < AT8 / BFL < 2.

8. The air gap distance BFL between the optical wedge and the photosensitive surface of the photosensitive chip along the optical axis satisfies 0.08 < BFL / TTL < 0.2 with respect to the total optical length TTL of the Sham optical system.

30. The Schamm optical system according to claim 24, characterized in that, The focal length f1 of the first lens satisfies 30mm≤f1≤40mm; the focal length f2 of the second lens satisfies 135mm≤f2≤145mm; the focal length f3 of the third lens satisfies 25mm≤f3≤35mm; the focal length f4 of the fourth lens satisfies -20mm≤f4≤-10mm; the focal length f5 of the fifth lens satisfies -15mm≤f5≤-5mm; the focal length f6 of the sixth lens satisfies 15mm≤f6≤25mm; the focal length f7 of the seventh lens satisfies 70mm≤f7≤80mm; the focal length f8 of the eighth lens satisfies 40mm≤f8≤50mm; and the focal length f9 of the ninth lens satisfies 60mm≤f9≤70mm.

31. The Schamm optical system according to claim 24, characterized in that, The focal length f1 of the first lens and the focal length f of the Sham lens satisfy 0.6 < f1 / f < 1.2; the focal length f2 of the second lens and the focal length f of the Sham lens satisfy 3 < f2 / f < 4.2; the focal length f3 of the third lens and the focal length f of the Sham lens satisfy 0.5 < f3 / f < 1; the focal length f4 of the fourth lens and the focal length f of the Sham lens satisfy 0.2 < |f4 / f| < 0.6; the focal length f5 of the fifth lens and the focal length f of the Sham lens satisfy 0.6 < f1 / f < 1.2; the focal length f1 of the third lens and the focal length f of the Sham lens satisfy 0.6 < f1 / f < 1.2; the focal length f2 of the fourth lens and the focal length f of the Sham lens satisfy 0.2 < |f4 / f| < 0.6; the focal length f5 of the fifth lens and the focal length f of the Sham lens satisfy 0.6 < f1 / f < 1.2; the focal length f1 of the third lens and the focal length f of the Sham lens satisfy 0.6 < f1 / f < 1.2; the focal length f1 of the fourth lens and the focal length f of the Sham lens satisfy 0.6 < f1 / f < 1.2; the focal length f2 of the second lens and the focal length f of the Sham lens satisfy 0.6 < f1 / f < 1.2; the focal length f2 of the third lens and the focal length f of the Sham lens satisfy 0.6 < f1 / f < 1.2; the focal length f2 of the fourth ... The following conditions must be met for the focal length f: 0.1 < |f5 / f| < 0.5; the following conditions must be met for the focal length f of the sixth lens and the Sham lens: 0.3 < f6 / f < 0.8; the following conditions must be met for the focal length f of the seventh lens and the Sham lens: 1.5 < f7 / f < 2.3; the following conditions must be met for the focal length f of the eighth lens and the Sham lens: 0.8 < f8 / f < 1.5; and the following conditions must be met for the focal length f of the ninth lens and the Sham lens: 1.3 < f9 / f < 2.

0.

32. The Schamm optical system according to claim 24, characterized in that, The first lens has a refractive index N1 satisfying 1.8 ≤ N1 ≤ 1.9 and an Abbe number V1 satisfying 45 ≤ V1 ≤ 50; the second lens has a refractive index N2 satisfying 1.5 ≤ N2 ≤ 1.6 and an Abbe number V2 satisfying 55 ≤ V2 ≤ 60; the third lens has a refractive index N3 satisfying 1.8 ≤ N3 ≤ 1.9 and an Abbe number V3 satisfying 30 ≤ V3 ≤ 35; the fourth lens has a refractive index N4 satisfying 1.5 ≤ N4 ≤ 1.6 and an Abbe number V4 satisfying 55 ≤ V4 ≤ 60; and the fifth lens has a refractive index N5 satisfying 1.8 ≤ N5 ≤ 1.8 ≤ N1 ≤ 1.

9. The refractive index of the sixth lens is ≤1.9, and the Abbe number V5 satisfies 25≤V5≤30; the refractive index of the seventh lens is 1.5≤N6≤1.6, and the Abbe number V6 satisfies 65≤V6≤70; the refractive index of the seventh lens is 1.8≤N7≤1.9, and the Abbe number V7 satisfies 45≤V7≤50; the refractive index of the eighth lens is 1.6≤N8≤1.7, and the Abbe number V8 satisfies 55≤V8≤60; the refractive index of the ninth lens is 1.7≤N9≤1.8, and the Abbe number V9 satisfies 40≤V9≤45.

33. The Schamm optical system according to claim 24, characterized in that, The radius of curvature R31 of the incident surface of the third lens and the radius of curvature R42 of the exit surface of the fourth lens satisfy 0.6 < R31 / R42 < 1.5; the radius of curvature R51 of the incident surface of the fifth lens and the radius of curvature R62 of the exit surface of the sixth lens satisfy 0.6 < R51 / R62 < 1.

5. The center thickness GT3 of the third lens and the center thickness GT4 of the fourth lens satisfy 0.6 < GT3 / GT4 < 3; the center thickness of the fifth lens and the center thickness GT6 of the sixth lens satisfy 0.5 < GT5 / GT6 < 2; The Abbe number V3 of the third lens and the Abbe number V4 of the fourth lens satisfy 20 < |V3-V4| < 30; the Abbe number V5 of the fifth lens and the Abbe number V6 of the sixth lens satisfy 35 < |V5-V6| < 45.

34. The Schamm optical system according to claim 24, characterized in that, The working distance WD of the Sham lens satisfies 30mm≤WD≤60mm, and the magnification PMAG satisfies 0.6≤PMAG≤0.7; the focal length f of the Sham lens satisfies 35mm≤f≤45mm; the aperture number Fno satisfies F2.1≤Fno≤F2.4; the working wavelength WL satisfies 380mm≤WL≤450mm, and the Sham angle α satisfies 40°≤α≤45°; a photosensitive chip is provided on the light-emitting side of the light wedge, and the focal length f of the Sham lens and the target surface size IMG of the photosensitive chip satisfy 1.9<f / IMG<4.

35. The Schamm optical system according to claim 24, characterized in that, The first lens, the second lens, the third lens, and the fourth lens form a front lens group; the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens form a rear lens group. The focal length fa of the front lens group satisfies 25mm≤fa≤35mm, and the focal length fb of the rear lens group satisfies 20mm≤fb≤30mm; The axial distance d12 between the front lens group and the rear lens group satisfies 6mm≤d12≤8mm, and the axial distance d23 between the rear lens group and the optical wedge satisfies 27mm≤d23≤29mm.

36. The Schamm optical system according to claim 35, characterized in that, The focal length fa of the front lens group and the focal length f of the Sham lens satisfy 0.5 < fa / f < 1; the focal length fb of the rear lens group and the focal length f of the Sham lens satisfy 0.4 < fb / f < 1.2; the axial distance d12 between the front lens group and the rear lens group and the axial distance d23 between the rear lens group and the optical wedge satisfy 0.2 < d12 / d23 < 0.

3.

37. An electronic device, characterized in that, Includes the sensor module according to any one of claims 1-3, or the Sham optical system according to any one of claims 4-36.

38. The electronic device according to claim 37, characterized in that, The electronic device is a 3D camera.

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