Optical imaging lens capable of regulating and controlling temperature

Abstract

An optical imaging lens capable of regulating and controlling temperature comprises an imaging lens group, an imaging lens group positioning element, a heat conduction module and a heating module. The imaging lens group comprises a first lens and a second lens which have refractive power; the imaging lens group positioning element comprises a lens base, the lens base is hollow and does not have light transmission, and a barrel part is arranged in the lens base and used for containing the imaging lens group; the heat conduction module is arranged in the barrel part of the imaging lens group positioning element, the heat conduction module surrounds between the first lens and the second lens, and the heat conduction module is in contact with the first lens and the second lens; the heating module is connected with the heat conduction module and used for providing a heat source for the first lens and the second lens, and the lens demisting effect is achieved through the design of the heating lens.

Description

Technical Field

[0001] The invention relates to the structural design of a lens barrel, and in particular to an optical imaging lens capable of adjusting temperature. Background Art

[0002] The design of optical imaging lenses usually needs to consider the environmental adaptability of lens materials under various temperature conditions. For example, optical imaging lenses used outdoors, including automotive photography lenses, sports photography lenses, or aerial camera lenses, usually require the use of multiple glass lenses to reduce the impact of temperature changes on the lens shape; while optical imaging lenses used indoors, including surveillance photography lenses, usually use plastic lenses to reduce costs and weight because the indoor environment is usually maintained at a certain room temperature range.

[0003] However, although the problem of lens deformation caused by temperature changes can be improved by lens materials for optical imaging lenses used outdoors, when the optical imaging lens is faced with an environment with a large temperature difference or encounters low-temperature and cold weather, the lens surface of the optical imaging lens is easily fogged or frosted due to condensation of water vapor in the air when it is cold, and even the lens inside the optical imaging lens is formed into ice and snow, resulting in obstruction of the field of view of the optical imaging lens, thereby affecting the clarity of the imaging. In severe cases, the lens of the optical imaging lens may be broken, or even the internal components of the optical imaging lens may malfunction and be damaged.

[0004] Therefore, how to provide a method for improving the fogging phenomenon of an optical lens is a technical problem that needs to be solved urgently. Summary of the invention

[0005] In view of this, an implementation method of an embodiment of the present invention is to provide an optical imaging lens with adjustable temperature, and achieve the effect of lens defogging by designing a heating lens.

[0006] In order to achieve the above-mentioned purpose, a preferred embodiment of the present invention provides an optical imaging lens with adjustable temperature, comprising an imaging lens group, an imaging lens group positioning element, a heat conduction module and a heating module. The imaging lens group comprises at least five lenses with refractive power and an imaging surface, and the multiple lenses are arranged in sequence from the object side to the image side as a first lens, a second lens, a third lens, a fourth lens and a fifth lens; the imaging lens group positioning element comprises a lens seat, the lens seat is hollow and not light-transmissive, and the lens seat has a barrel portion inside for accommodating the imaging lens group; the heat conduction module is arranged in the barrel portion of the imaging lens group positioning element, the heat conduction module surrounds the first lens and the second lens, and the heat conduction module contacts the first lens and the second lens; the heating module is connected to the heat conduction module to provide a heat source for the first lens and the second lens; wherein the imaging The focal length of the lens group is f, the entrance pupil diameter of the imaging lens group is HEP, half of the maximum viewing angle of the imaging lens group is HAF, there is a distance HOS between the object side of the first lens and the imaging surface, the intersection of any surface of any lens in the multiple lenses and the optical axis of the imaging lens group is taken as the starting point, along the contour of the surface to the coordinate point on the surface at a vertical height of 1 / 2 of the entrance pupil diameter from the optical axis of the imaging lens group, the length of the contour curve between the above two points is ARE, which satisfies the following conditions: 1.2≤f / HEP≤3.0; 1.5≤HOS / f≤10; 50deg<HAF≤100deg; and 0.1≤2(ARE / HEP)≤2.0.

[0007] Another preferred embodiment of the present invention provides an optical imaging lens with adjustable temperature, comprising an imaging lens group, an imaging lens group positioning element, a heat conduction module and a heating module. The imaging lens group comprises at least five lenses with refractive power and an imaging surface, wherein the multiple lenses are arranged in sequence from the object side to the image side as a first lens, a second lens, a third lens, a fourth lens and a fifth lens; the imaging lens group positioning element comprises a lens seat, which is hollow and not light-transmissive, and has a barrel inside the lens seat for accommodating the imaging lens group; the heat conduction module is disposed in the barrel of the imaging lens group positioning element, the heat conduction module surrounds the first lens and the second lens, and the heat conduction module contacts the second lens; the heating module is disposed on the heat conduction module and contacts the first lens, so as to provide a heat source for the first lens and the second lens; wherein the The focal length of the imaging lens group is f, the entrance pupil diameter of the imaging lens group is HEP, half of the maximum viewing angle of the imaging lens group is HAF, there is a distance HOS between the object side of the first lens and the imaging surface, the intersection of any surface of any lens in the multiple lenses and the optical axis of the imaging lens group is taken as the starting point, along the contour of the surface to the coordinate point on the surface at a vertical height of 1 / 2 of the entrance pupil diameter from the optical axis of the imaging lens group, the length of the contour curve between the above two points is ARE, which satisfies the following conditions: 1.2≤f / HEP≤3.0; 1.5≤HOS / f≤10; 50deg<HAF≤100deg; and 0.1≤2(ARE / HEP)≤2.0.

[0008] Another preferred embodiment of the present invention provides an optical imaging lens with adjustable temperature, comprising an imaging lens group, an imaging lens group positioning element, a heat conduction module and a heating module. The imaging lens group comprises at least five lenses with refractive power and an imaging surface, wherein the multiple lenses are arranged in sequence from the object side to the image side as a first lens, a second lens, a third lens, a fourth lens and a fifth lens; the imaging lens group positioning element comprises a lens seat, which is hollow and not light-transmissive, and has a barrel portion inside the lens seat for accommodating the imaging lens group; the heat conduction module is disposed in the barrel portion of the imaging lens group positioning element, the heat conduction module surrounds the first lens and the second lens, and the heat conduction module contacts the second lens; the heating module is connected to the heat conduction module to provide a heat source for the first lens and the second lens; wherein the focal length of the imaging lens group is f, the imaging The entrance pupil diameter of the lens group is HEP, half of the maximum viewing angle of the imaging lens group is HAF, there is a distance HOS between the object side of the first lens and the imaging surface, the intersection of any surface of any lens in the multiple lenses and the optical axis of the imaging lens group is taken as the starting point, along the contour of the surface until the coordinate point on the surface at a vertical height of 1 / 2 of the entrance pupil diameter from the optical axis of the imaging lens group, the length of the contour curve between the above two points is ARE, the fourth lens and the fifth lens are glued, which meet the following conditions: 1.6≤f / HEP≤2.31; 1.7≤HOS / f≤8.0; 60deg<HAF≤70deg; and 0.1≤2(ARE / HEP)≤2.0.

[0009] The terms and codes of lens parameters related to the embodiments of the present invention are listed below for reference in the subsequent description:

[0010] Lens parameters related to length or height:

[0011] The present invention can select a wavelength of 555nm as the main reference wavelength and the benchmark for measuring focus shift in the visible light spectrum; the maximum imaging height of the imaging lens group is represented by HOI; the distance between the object side of the first lens of the imaging lens group and the imaging surface is represented by HOS; the distance between the object side of the first lens of the imaging lens group and the image side of the last lens is represented by InTL; the distance between the aperture of the imaging lens group and the imaging surface is represented by InS; the distance between the first lens and the second lens of the imaging lens group on the optical axis of the imaging lens group is represented by IN12 (for example); the thickness of the first lens of the imaging lens group on the optical axis of the imaging lens group is represented by TP1, the thickness of the second lens on the optical axis of the imaging lens group is represented by TP2, and the thickness of the third lens on the optical axis of the imaging lens group is represented by TP3.

[0012] Lens parameters related to viewing angle:

[0013] The maximum viewing angle of the imaging lens group is represented by AF; and half of the maximum viewing angle of the imaging lens group is represented by HAF.

[0014] Lens parameters related to entrance and exit pupils:

[0015] The entrance pupil diameter of the imaging lens group is represented by HEP, wherein the contour curve length of 1 / 2 entrance pupil diameter (HEP) of any surface of a single lens refers to the intersection of the surface of the lens and the optical axis of the imaging lens group as the starting point, from the starting point along the surface contour of the lens to the coordinate point on the surface at a vertical height of 1 / 2 entrance pupil diameter from the optical axis of the imaging lens group, the arc length of the curve between the aforementioned two points is the contour curve length of 1 / 2 entrance pupil diameter (HEP), and is represented by ARE. For example, the contour curve length of 1 / 2 entrance pupil diameter (HEP) of the object side of the first lens is represented by ARE11, and the contour curve length of 1 / 2 entrance pupil diameter (HEP) of the image side of the first lens is represented by ARE12. The contour curve length of 1 / 2 entrance pupil diameter (HEP) of the object side of the second lens is represented by ARE21, and the contour curve length of 1 / 2 entrance pupil diameter (HEP) of the image side of the second lens is represented by ARE22. The length of the contour curve of 1 / 2 entrance pupil diameter (HEP) of any surface of the remaining lenses in the imaging lens group is expressed in the same way; the maximum effective radius of any surface of any lens refers to the intersection point (Effective Half Diameter; EHD) of the incident light of the system's maximum viewing angle passing through the edge of the entrance pupil at the lens surface, and the vertical height between the intersection point and the optical axis of the imaging lens group. For example, the maximum effective radius of the object side of the first lens is expressed by EHD11, and the maximum effective radius of the image side of the first lens is expressed by EHD12. The maximum effective radius of the object side of the second lens is expressed by EHD21, and the maximum effective radius of the image side of the second lens is expressed by EHD22. The maximum effective radius of any surface of the remaining lenses in the imaging lens group is expressed in the same way.

[0016] Variables related to aberrations:

[0017] The TV distortion of the imaging lens group when forming an image is represented by TDT, and can be further defined to describe the degree of aberration deviation between 50% and 100% of the imaging field of view.

[0018] The lateral aberration at the aperture edge is represented by STA (STOP Transverse Aberration). To evaluate the performance of a specific imaging lens group, the lateral aberration of light rays in any field of view can be calculated on the tangential fan or sagittal fan, and in particular, the lateral aberration magnitude of the longest working wavelength (e.g., wavelength of 650NM) and the shortest working wavelength (e.g., wavelength of 470NM) passing through the aperture edge can be calculated as a criterion for excellent performance. The coordinate direction of the aforementioned meridional fan can be further divided into positive (upper light rays) and negative (lower light rays). The lateral aberration of the longest working wavelength through the aperture edge is defined as the distance difference between the imaging position of the longest working wavelength through the aperture edge incident on a specific field of view on the imaging plane and the imaging position of the reference wavelength main light (for example, the wavelength is 555NM) on the imaging plane. The lateral aberration of the shortest working wavelength through the aperture edge is defined as the distance difference between the imaging position of the shortest working wavelength through the aperture edge incident on a specific field of view on the imaging plane and the imaging position of the reference wavelength main light on the imaging plane. The performance of the specific imaging lens group is evaluated as excellent. The lateral aberration of the shortest and longest working wavelengths through the aperture edge incident on 0.7 fields of view (i.e., 0.7 imaging height HOI) on the imaging plane is less than 100 microns (μm) as a verification method. It can even be further verified that the lateral aberration of the shortest and longest working wavelengths through the aperture edge incident on 0.7 fields of view on the imaging plane is less than 80 microns (μm) as a verification method.

[0019] The imaging lens group has a maximum imaging height HOI perpendicular to the optical axis of the imaging lens group on the imaging plane. The lateral aberration of the longest working wavelength of the visible light of the positive meridian light fan of the imaging lens group passes through the edge of the entrance pupil and is incident on the imaging plane at 0.7HOI is represented by PLTA, the lateral aberration of the shortest working wavelength of the visible light of the positive meridian light fan passes through the edge of the entrance pupil and is incident on the imaging plane at 0.7HOI is represented by PSTA, the lateral aberration of the longest working wavelength of the visible light of the negative meridian light fan passes through the edge of the entrance pupil and is incident on The lateral aberration at 0.7HOI on the imaging plane is represented by NLTA, the lateral aberration at 0.7HOI on the imaging plane by the shortest working wavelength of visible light of the negative meridian light fan passing through the edge of the entrance pupil and incident on the imaging plane is represented by NSTA, the lateral aberration at 0.7HOI on the imaging plane by the longest working wavelength of visible light of the sagittal light fan passing through the edge of the entrance pupil and incident on the imaging plane is represented by SLTA, and the lateral aberration at 0.7HOI on the imaging plane by the shortest working wavelength of visible light of the sagittal light fan passing through the edge of the entrance pupil and incident on the imaging plane is represented by SSTA.

[0020] The effect of the present invention is that the temperature-adjustable optical imaging lens is designed to surround the heat-conducting module between the first lens and the second lens in the imaging lens group, and the heat-conducting module at least contacts the second lens; when the heating module is actually started to heat the heat-conducting module, the heat-conducting module can conduct the heat energy of the heating module to the first lens and the second lens, so that the surface moisture of the first lens can be effectively evaporated by heat, and the phenomenon of fogging of the first lens can be relatively reduced. The heating of the second lens can further prevent the environmental moisture from entering the inside of the lens holder to generate condensation, so that the temperature-adjustable optical imaging lens is not limited by the change of climate temperature difference and can be effectively applied to various working environments to maintain excellent image capture effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other features of the present invention will be described in detail with reference to the accompanying drawings.

[0022] Figure 1 It is a structural stereogram of the temperature-adjustable optical imaging lens of the first embodiment of the present invention;

[0023] Figure 2 It is a structural exploded view of the temperature-adjustable optical imaging lens according to the first embodiment of the present invention;

[0024] Figure 3 A top view of the temperature-adjustable optical imaging lens according to the first embodiment of the present invention;

[0025] Figure 4 yes Figure 3 A schematic cross-sectional view along section line 4-4;

[0026] Figure 5 for Figure 4 A partial enlarged schematic diagram thereof;

[0027] Figure 6 is a cross-sectional schematic diagram of a temperature-adjustable optical imaging lens according to a second embodiment of the present invention;

[0028] Figure 7 for Figure 6 A partial enlarged schematic diagram thereof;

[0029] Figure 8 is a cross-sectional schematic diagram of a temperature-adjustable optical imaging lens according to a third embodiment of the present invention;

[0030] Fig. 9 for Figure 8 A partial enlarged schematic diagram thereof;

[0031] Fig. 10A is a schematic diagram of the lens arrangement of an imaging lens assembly according to a fourth embodiment of the present invention;

[0032] Fig. 10B The graphs of spherical aberration, astigmatism and optical distortion of the imaging lens unit according to the fourth embodiment of the present invention are shown in order from left to right;

[0033] Fig. 10C The lateral aberration diagrams of the meridional light fan and the sagittal light fan, the longest working wavelength and the shortest working wavelength passing through the aperture edge at the 0.7 field of view of the imaging lens assembly of the fourth embodiment of the present invention;

[0034] Fig.11A is a schematic diagram of the lens arrangement of an imaging lens assembly according to a fifth embodiment of the present invention;

[0035] Fig. 11B The graphs showing the spherical aberration, astigmatism and optical distortion of the imaging lens unit according to the fifth embodiment of the present invention are shown from left to right;

[0036] Fig. 11C The lateral aberration diagrams of the meridian light fan and the sagittal light fan, the longest working wavelength and the shortest working wavelength passing through the aperture edge at the field of view of 0.7 of the imaging lens assembly of the fifth embodiment of the present invention are shown;

[0037] Fig. 12A A schematic diagram of the lens arrangement of an imaging lens assembly according to a sixth embodiment of the present invention;

[0038] Fig. 12B From left to right are graphs showing the spherical aberration, astigmatism and optical distortion of the imaging lens unit according to the sixth embodiment of the present invention;

[0039] Fig. 12C 1 is a diagram showing the lateral aberration of the meridional light fan and the sagittal light fan of the imaging lens unit of the sixth embodiment of the present invention, the longest working wavelength and the shortest working wavelength passing through the aperture edge at the 0.7 field of view;

[0040] Fig.13A is a schematic diagram of the lens arrangement of an imaging lens assembly according to a seventh embodiment of the present invention;

[0041] Fig. 13B From left to right are graphs showing the spherical aberration, astigmatism and optical distortion of the imaging lens unit according to the seventh embodiment of the present invention;

[0042] Fig. 13C The lateral aberration diagrams of the meridian light fan and the sagittal light fan, the longest working wavelength and the shortest working wavelength passing through the aperture edge at the 0.7 field of view of the imaging lens assembly of the seventh embodiment of the present invention;

[0043] Fig.14A is a schematic diagram showing the lens arrangement of an imaging lens group according to an eighth embodiment of the present invention;

[0044] Fig. 14BThe graphs of spherical aberration, astigmatism and optical distortion of the imaging lens unit of the eighth embodiment of the present invention are shown in sequence from left to right;

[0045] Fig. 14C The lateral aberration diagrams of the meridian light fan and the sagittal light fan, the longest working wavelength and the shortest working wavelength passing through the aperture edge at the 0.7 field of view of the imaging lens assembly of the eighth embodiment of the present invention;

[0046] Fig.15A is a schematic diagram of the lens arrangement of an imaging lens assembly according to a ninth embodiment of the present invention;

[0047] Fig. 15B The graphs of spherical aberration, astigmatism and optical distortion of the imaging lens unit according to the ninth embodiment of the present invention are shown in order from left to right;

[0048] Fig. 15C The lateral aberration diagrams of the meridional light fan and the sagittal light fan, the longest working wavelength and the shortest working wavelength passing through the aperture edge at 0.7 field of view of the imaging lens unit of the ninth embodiment of the present invention are shown.

[0049] Description of reference numerals:

[0050] 100, 200, 300: Temperature-controlled optical imaging lens

[0051] 10: Imaging lens group positioning element

[0052] 11: Mirror mount

[0053] 111: Assembly joint section

[0054] 112: Accommodating Body

[0055] 113: External thread segment

[0056] 12: Cylinder

[0057] 121: Installation slot

[0058] 122: Container

[0059] 123: Side opening

[0060] 13: Outer cover

[0061] 131: Internal thread section

[0062] 132: retaining ring

[0063] 133: Passage

[0064] 20: Imaging lens group

[0065] 21: First lens

[0066] 211: First optical effective area

[0067] 212: First optical ineffective area

[0068] 22: Second lens

[0069] 221: Second optical effective area

[0070] 222: Second optical ineffective area

[0071] 23: The third lens

[0072] 24: The fourth lens

[0073] 25: Fifth lens

[0074] 30: Thermal conductivity module

[0075] 31: Washer

[0076] 311: Last week

[0077] 3111: Ring convex part

[0078] 3112: against the steps

[0079] 312: Next week

[0080] 313: Inner ring hole

[0081] 3131: Upper rim

[0082] 3132: Lower rim

[0083] 40: Heating module

[0084] 41: Electric heating ring

[0085] 42: Power connection

[0086] 50, 60, 70, 80, 90, 400: Imaging lens group

[0087] 51, 61, 71, 81, 91, 410: First lens

[0088] 511, 611, 711, 811, 911, 4101: side view

[0089] 512, 612, 712, 812, 912, 4102: like side view

[0090] 52, 62, 72, 82, 92, 420: Second lens

[0091] 521, 621, 721, 821, 921, 4201: side view

[0092] 522, 622, 722, 822, 922, 4202: like side view

[0093] 53, 63, 73, 83, 93, 430: Third lens

[0094] 531, 631, 731, 831, 931, 4301: side view

[0095] 532, 632, 732, 832, 932, 4302: Like the side

[0096] 54, 64, 74, 84, 94, 440: fourth lens

[0097] 541, 641, 741, 841, 941, 4401: side view

[0098] 542, 642, 742, 842, 942, 4402: Like the side

[0099] 55, 65, 75, 85, 95, 450: Fifth lens

[0100] 551, 651, 751, 851, 951, 4501: side view

[0101] 552, 652, 752, 852, 952, 4502: like side view

[0102] 96, 460: Sixth lens

[0103] 961, 4601: side view

[0104] 962, 4602: Like the side

[0105] 470: Seventh lens

[0106] 4701: Side view

[0107] 4702: Like the side

[0108] 56, 66, 76, 86, 97, 480: Infrared filter

[0109] 56, 66, 77, 87, 98, 490: Imaging surface

[0110] ST: Aperture

[0111] L: Central axis

[0112] TP1: The thickness of the first lens on the optical axis

[0113] TP2: The thickness of the second lens on the optical axis

[0114] TP3: Thickness of the third lens on the optical axis

[0115] InTL: The distance between the object side of the first lens and the image side of the last lens

[0116] HOI: Maximum imaging height perpendicular to the optical axis on the imaging plane

[0117] HEP: Entrance pupil diameter of the imaging lens group

[0118] HAF: Half of the maximum viewing angle of the imaging lens group

[0119] HOS: The distance from the object side of the first lens to the imaging surface on the optical axis DETAILED DESCRIPTION

[0120] In order to more clearly illustrate the present invention, preferred embodiments are described in detail below with reference to the accompanying drawings. Figures 1 to 4 , which is a temperature-adjustable optical imaging lens 100 provided in a first preferred embodiment of the present invention, comprises an imaging lens group positioning element 10, an imaging lens group 20, a heat conduction module 30 and a heating module 40.

[0121] The imaging lens assembly positioning element 10 includes a lens seat 11. The lens seat 11 is hollow and not light-transmissive. The lens seat 11 has a tube 12 inside for accommodating the imaging lens assembly 20. Figures 2 to 4 As shown, the barrel 12 includes a group of joint sections 111 and a receiving body section 112, and the mirror base 11 is formed by extending the group joint section 111 and the receiving body section 112 along a central axis L, wherein the barrel 12 has a mounting groove 121 on the inner side of the group joint section 111, and the barrel 12 has a receiving groove 122 passing through the inner side of the receiving body section 112 along the central axis L to communicate with the mounting groove 121. In addition, the barrel 12 also includes a side opening 123, and the side opening 123 is located on the inner side of the receiving body section 112 and laterally penetrates the side wall of the mounting groove 121, so that the mounting groove 121 is laterally connected to the outer side of the group joint section 111 through the side opening 123.

[0122] In addition, the imaging lens assembly positioning element 10 further comprises an outer cover 13, and the outer cover 13 is assembled to the assembly joint section 111 of the lens holder 11. Figure 2 , Figure 4 As shown, the outer periphery of the assembly joint section 111 of the mirror holder 11 has an external thread section 113, and the inner side of the outer cover 13 has an internal thread section 131 correspondingly screwed to the external thread section 113, wherein a retaining ring 132 extends inwardly at one end of the outer cover 13, and the retaining ring 132 partially blocks the opening of the mounting groove 121 of the assembly joint section 111, and a through opening 133 is formed on the inner side of the retaining ring 132 to communicate with the mounting groove 121.

[0123] The imaging lens group 20 is installed in the lens holder 11 of the imaging lens group positioning element 10. The imaging lens group 20 includes five lenses with refractive power and an imaging surface (not shown in the figure). The multiple lenses are arranged in sequence as a first lens 21, a second lens 22, a third lens 23, a fourth lens 24 and a fifth lens 25. In the first embodiment, the first lens 21, the second lens 22, the third lens 23, the fourth lens 24 and the fifth lens 25 are arranged in sequence from the object side to the image side along the central axis L and installed in the barrel 12, wherein the first lens 21 is installed in the installation groove 121 of the assembly joint section 111, and the second lens 22, the third lens 23, the fourth lens 24 and the fifth lens 25 are arranged in sequence from the object side to the image side along the central axis L. 3. The fourth lens 24 and the fifth lens 25 are arranged and installed in the receiving groove 122 of the receiving body section 112 respectively. When the first lens 21 is loaded in the mounting groove 121 of the assembly joint section 111, the outer cover 13 is assembled to the assembly joint section 111 of the lens holder 11 accordingly. At this time, the retaining ring 132 of the outer cover 13 abuts against the periphery of the first lens 21, so that the first lens 21 is positioned in the mounting groove 121, and the object side surface of the first lens 21 is exposed to the through opening 133 on the inner side of the retaining ring 132, wherein the optical axis of the imaging lens group 20 overlaps with the central axis L of the barrel 12, so that light can pass through the imaging lens group 20 installed in the barrel 12 and be projected onto the imaging surface.

[0124] Please see again Figure 4 , Figure 5 , more specifically describing the optical structures of the first lens 21 and the second lens 22, wherein the first lens 21 has a first optically effective area 211 and a first optically invalid area 212, the first optically invalid area 212 surrounds the periphery of the first optically effective area 211; the first optically effective area 211 represents the area through which the optical axis of the corresponding imaging lens group 20 and the imaging light passes, and the first optically invalid area 212 represents the area surrounding the optical axis of the imaging lens group 20 and through which the imaging light does not pass; the second lens 22 has a second optically effective area 221 and a second optically invalid area 222, the second optically effective area 221 faces the first optically effective area 211, and the second optically invalid area 222 surrounds the periphery of the second optically effective area 221, wherein the second optically effective area 221 represents the area through which the optical axis of the corresponding imaging lens group 20 and the imaging light passes, and the second optically invalid area 222 represents the area surrounding the optical axis of the imaging lens group 20 and through which the imaging light does not pass.

[0125] The heat conducting module 30 is disposed in the barrel 12 of the imaging lens assembly positioning element 10. The heat conducting module 30 surrounds the first lens 21 and the second lens 22, and the heat conducting module 30 contacts the first lens 21 and the second lens 22. In the first embodiment, the heat conducting module 30 is a gasket 31 made of a heat conducting material. The gasket 31 is basically made of a metal material, such as aluminum, gold or copper, wherein the thermal conductivity of the gasket 31 is between 200 W / mK and 400 W / mK, and the linear thermal expansion coefficient is between 15x10 -6 / K to 30x10 -6 / K, whereby the material characteristics of the gasket 31 can provide high thermal conductivity.

[0126] like Figure 4 , Figure 5 As shown, the gasket 31 has an upper peripheral surface 311 and a lower peripheral surface 312, the upper peripheral surface 311 faces the first lens 21, and the lower peripheral surface 312 faces the second lens 22, and the gasket 31 has an inner ring hole 313 penetrating the upper peripheral surface 311 and the lower peripheral surface 312, and the inner ring hole 313 is formed with an upper edge 3131 located on the inner side of the upper peripheral surface 311, and a lower edge 3132 located on the inner side of the lower peripheral surface 312, wherein the gasket 31 is placed on the second lens 22, and the object side surface of the second lens 22 abuts against the lower edge 3132 and extends into the inner ring hole 313 in an arc shape, and the image side surface of the first lens 21 abuts against the upper peripheral surface 311, as shown in FIG. Figure 5 As shown, in the first embodiment, the gasket 31 is disposed between the first optically ineffective area 212 and the second optically ineffective area 222 , and the inner annular hole 313 of the gasket 31 connects the first optically effective area 211 and the second optically effective area 221 .

[0127] In addition, the upper circumferential surface 311 of the gasket 31 has an annular protrusion 3111 and a resting step 3112. The annular protrusion 3111 surrounds the upper edge 3131, and the first lens 21 rests on the annular protrusion 3111. The resting step 3112 is recessed in the outer periphery of the annular protrusion 3111, thereby forming a gap between the resting step 3112 and the first lens 21.

[0128] The heating module 40 is connected to the heat conducting module 30 to provide a heat source for the first lens 21 and the second lens 22; Figure 4 , Figure 5As shown, the heating module 40 is installed in the mounting groove 121 on the inner side of the assembly joint section 111 of the lens holder 11, and the heating module 40 includes an electric heating ring 41 and a power connection portion 42. The electric heating ring 41 contacts the gasket 31 by surrounding the inner ring hole 313, wherein the electric heating ring 41 is arranged on the upper peripheral surface 311 of the gasket 31, and the electric heating ring 41 is sleeved on the abutting step 3112 by surrounding the annular protrusion 3111. When the first lens 21 is abutted on the annular protrusion 3111 of the gasket 31, the electric heating ring 41 is correspondingly accommodated in the gap between the abutting step 3112 and the first lens 21, so that the electric heating ring 41 is located between the gasket 31 and the first lens 21. The power connection portion 42 is connected to the electric heating ring 41 and is led outward from the side port 123 of the barrel 12 to be connected to an external power source, so as to provide the electric heating ring 41 with the power required to generate the heat source.

[0129] Based on this, the design of the heat conducting module 30 and the heating module 40 in the first embodiment is to make the gasket 31 of the heat conducting module 30 directly contact the first lens 21 and the second lens 22; when the heating module 40 is actually started for heating, the heat conducting module 30 can directly conduct the heat energy of the heating module 40 to the first lens 21 and the second lens 22, so that the first lens 21 and the second lens 22 can be effectively heated, and because the electric heating ring 41 of the heating module 40 is located between the gasket 31 of the heat conducting module 30 and the first lens 21, the The first lens 21 can be effectively heated by the heating module 40, so that the object side of the first lens 21 exposed to the opening 133 of the outer cover 13 can effectively evaporate the ambient moisture, thereby reducing the phenomenon of fogging on the object side of the first lens 21. The second lens 22 conducts heat energy through the heat conduction module 30 to improve the fogging condition of the second lens 22, thereby improving the clarity of the captured image of the imaging lens group 20, so that the temperature-adjustable optical imaging lens 100 is not limited by the change of climate temperature difference and can be applied to various working environments to maintain excellent image capture effect.

[0130] See also Figure 6 , Figure 7 , which is a second preferred embodiment of the present invention, the basic structure of the temperature-adjustable optical imaging lens 200 includes the aforementioned imaging lens group positioning element 10, the aforementioned imaging lens group 20, the aforementioned heat conduction module 30 and the aforementioned heating module 40; in this second embodiment, the structures of the imaging lens group positioning element 10, the imaging lens group 20, the aforementioned heat conduction module 30 and the heating module 40 are basically the same as those of the aforementioned first embodiment, and are not repeated here.

[0131] The difference between the second embodiment and the first embodiment is that the second embodiment adjusts the installation position of the heating module 40; Figure 7 As shown, the electric heating ring 41 of the heating module 40 is located between the gasket 31 of the heat conducting module 30 and the second lens 22, wherein the electric heating ring 41 of the heating module 40 is fixed to the lower circumferential surface 312 of the gasket 31 corresponding to the lower edge 3132 of the gasket 31, so that the electric heating ring 41 of the heating module 40 is away from the first lens 21 and directly contacts the lower circumferential surface 312 of the gasket 31, and the electric heating ring 41 surrounds the second optical invalid area 222 of the second lens 22, and the power connection part 42 of the heating module 40 is led outward from the side opening 123 of the barrel 12, so that when the heating module 40 starts heating, the electric heating ring 41 of the heating module 40 can effectively heat the second lens 22 and correspondingly increase the temperature of the barrel 12, and further prevent the environmental moisture from entering the inside of the lens holder 11 to generate condensation, and the first lens 21 can also achieve the effect of lens defogging through the heat energy conduction of the heat conducting module 30.

[0132] See also Figure 8 , Fig. 9 , which is a third preferred embodiment of the present invention, the basic structure of the temperature-adjustable optical imaging lens 300 includes the aforementioned imaging lens group positioning element 10, the aforementioned imaging lens group 20, the aforementioned heat conduction module 30 and the aforementioned heating module 40; in this third embodiment, the structures of the imaging lens group positioning element 10, the imaging lens group 20, the aforementioned heat conduction module 30 and the heating module 40 are basically the same as those of the aforementioned first embodiment, and are not repeated here.

[0133] The difference between the third embodiment and the first embodiment is that the second embodiment adjusts the installation position of the heating module 40; Fig. 9 As shown, the electric heating ring 41 of the heating module 40 is located between the gasket 31 of the heat conductive module 30 and the first lens 21, wherein the electric heating ring 41 of the heating module 40 surrounds the inner ring hole 313 with an upper edge 3131 corresponding to the gasket 31, and the electric heating ring 41 is positioned on the upper peripheral surface 311 of the gasket 31 by the first lens 21, so that the electric heating ring 41 contacts the first optical invalid area 212 of the first lens 21, thereby the heating module 40 can directly heat the first lens 21, effectively increase the temperature of the first lens 21, and further enhance the defogging effect of the first lens 21.

[0134] In addition, in addition to the above-mentioned structural embodiments, the following is a description of feasible optical embodiments of the imaging lens group 20. The lens group L of the present invention can be designed using five working wavelengths, namely 470nm, 510nm, 555nm, 610nm, and 650nm, wherein 555nm is the reference wavelength for mainly extracting technical features.

[0135] The focal length of the imaging lens group 20 is f, the entrance pupil diameter of the imaging lens group 20 is HEP, half of the maximum viewing angle of the imaging lens group 20 is HAF, the object side surface of the first lens 21 is at a distance HOS from the imaging surface, and the intersection of any surface of any lens in the plurality of lenses and the optical axis is taken as the starting point, along the contour of the surface until the coordinate point on the surface at a vertical height of 1 / 2 of the entrance pupil diameter from the optical axis, the length of the contour curve between the above two points is ARE, which satisfies the following conditions: 1.2≤f / HEP≤3.0; 1.5≤HOS / f≤10; 50deg<HAF≤100deg; and 0.1≤2(ARE / HEP)≤2.0; in a preferred embodiment, 1.6≤f / HEP≤2.31, 60deg<HAF≤70deg, 1.7≤HOS / f≤8.0. Therefore, the miniaturization of the imaging lens group 20 can be maintained so as to be mounted on a thin and portable electronic product.

[0136] In addition, the intersection of any surface of any lens in the plurality of lenses and the optical axis is taken as the starting point, and the contour of the surface is followed to the coordinate point on the surface at a vertical height of 1 / 2 of the entrance pupil diameter from the optical axis. The length of the contour curve between the two points is ARE, which satisfies the following conditions: 0.9≤2(ARE / HEP)≤2.0; the maximum effective radius of any surface of any lens in the plurality of lenses is represented by EHD, and the intersection of any surface of any lens in the plurality of lenses and the optical axis is taken as the starting point, and the contour of the surface is followed to the coordinate point on the surface at a vertical height of 1 / 2 of the entrance pupil diameter from the optical axis. The length of the contour curve between the two points is ARS, which satisfies the following conditions: 0.9≤ARS / EHD≤2.0

[0137] The TV distortion of the imaging lens group 20 when forming an image is TDT. The imaging lens group 20 has a maximum imaging height HOI perpendicular to the optical axis on the imaging plane. The lateral aberration of the longest working wavelength of the visible light of the positive meridian light fan of the imaging lens group 20 passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by PLTA, the lateral aberration of the shortest working wavelength of the visible light of the positive meridian light fan passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by PSTA, the lateral aberration of the longest working wavelength of the visible light of the negative meridian light fan passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by NLTA, and the negative meridian light fan The lateral aberration of the shortest working wavelength of visible light passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by NSTA, the lateral aberration of the longest working wavelength of visible light of the sagittal plane light fan passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by SLTA, and the lateral aberration of the shortest working wavelength of visible light of the sagittal plane light fan passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by SSTA, which satisfies the following conditions: PLTA≤100 microns; PSTA≤100 microns; NLTA≤100 microns; NSTA≤100 microns; SLTA≤100 microns; and SSTA≤100 microns; │TDT│<100%.

[0138] In addition, the imaging lens assembly 20 of the present invention may be provided with at least one aperture according to needs to reduce stray light, which helps to improve image quality.

[0139] The aperture configuration of the present invention can be a front aperture or a center aperture, wherein the front aperture means that the aperture is set between the object and the first lens 21, and the center aperture means that the aperture is set between the first lens 21 and the imaging surface. If the aperture is a front aperture, the exit pupil of the imaging lens group 20 can be at a longer distance from the imaging surface to accommodate more optical elements, and the efficiency of the image sensing element receiving the image can be increased; if it is a center aperture, it is helpful to expand the field of view of the system, so that the imaging lens group 20 has the advantage of a wide-angle lens. The distance between the aperture and the imaging surface is InS, which satisfies the following conditions: 0.2≤InS / HOS≤1.1. Therefore, it is possible to simultaneously maintain the miniaturization of the imaging lens group 20 and have the characteristics of a wide angle.

[0140] The distance between the first lens 21 and the second lens 22 on the optical axis is IN12, and satisfies the following condition: 0.9≤IN12 / f≤1.1, thereby helping to improve the chromatic aberration of the lens to enhance its performance.

[0141] The thickness of the first lens 21 on the optical axis is TP1, the thickness of the second lens 22 on the optical axis is TP2, and the thickness of the third lens 23 on the optical axis is TP3, which meet the following conditions: 0.6≤TP1 / TP2≤0.9; 0.4≤TP2 / TP3≤0.6. Therefore, it is helpful to control the sensitivity of the imaging lens assembly 20 and improve its performance.

[0142] In other embodiments, the imaging lens group may include six lenses with refractive power, that is, it further includes a sixth lens, the sixth lens is located between the fifth lens and the imaging plane, wherein the object side of the first lens has a distance HOS on the optical axis to the imaging plane, and the object side of the first lens has a distance InTL on the optical axis to the image side of the sixth lens, which satisfies the following condition: 0.1≤InTL / HOS≤0.95; or, the imaging lens group may include seven lenses with refractive power, that is, it further includes a seventh lens, the seventh lens is located between the sixth lens and the imaging plane, wherein the object side of the first lens has a distance HOS on the optical axis to the imaging plane, and the object side of the first lens has a distance InTL on the optical axis to the image side of the seventh lens, which satisfies the following condition: 0.1≤InTL / HOS≤0.95. Therefore, it helps to slightly correct the aberrations generated by the incident light traveling process layer by layer and reduce the total height of the system.

[0143] In the imaging lens group 20 provided by the present invention, the material of the lens can be plastic or glass. When the lens material is plastic, the production cost and weight can be effectively reduced. When the lens material is glass, the thermal effect can be controlled and the design space of the refractive power configuration of the imaging lens group 20 can be increased. In addition, the object side and image side of the lens in the imaging lens group 20 can be aspherical, which can obtain more control variables. In addition to reducing aberrations, it can even reduce the number of lenses used compared to the use of traditional glass lenses, thereby effectively reducing the total height of the imaging lens group 20 of the present invention.

[0144] The equation for the above aspheric surface is:

[0145] z=ch 2 / [1+[1-(k+1)c 2 h 2 ] 0.5 ]+A4h 4 +A6h 6 +A8h 8 +A10h 10 +A12h 12 +A14h 14

[0146] +A16h 16 +A18h 18+A20h 20 +…(1)

[0147] Wherein, z is the position value at a height of h along the optical axis with reference to the surface vertex, k is the cone coefficient, c is the reciprocal of the radius of curvature, and A4, A6, A8, A10, A12, A14, A16, A18 and A20 are high-order aspheric coefficients.

[0148] Furthermore, in the imaging lens assembly 20 provided by the present invention, if the lens surface is convex, it means in principle that the lens surface is convex at the near optical axis; if the lens surface is concave, it means in principle that the lens surface is concave at the near optical axis.

[0149] The imaging lens assembly 20 of the present invention can also be applied to a mobile focusing optical system as required, and has the characteristics of excellent aberration correction and good imaging quality, thereby expanding the application range.

[0150] According to the above implementation modes, specific embodiments are proposed below and described in detail with reference to the accompanying drawings.

[0151] Fourth embodiment:

[0152] Please refer to Fig. 10A and Fig. 10B ,in Fig. 10A FIG. 4 is a schematic diagram showing the structure of an imaging lens assembly 50 according to a fourth embodiment of the present invention. Fig. 10B From left to right are the spherical aberration, astigmatism and optical distortion curves of the imaging lens assembly 50 of the fourth embodiment.

[0153] Fig. 10C is a lateral aberration diagram of the imaging lens group 50 of the fourth embodiment at a field of view of 0.7. Fig. 10A It can be seen that the imaging lens group 50 includes, from the object side to the image side, a first lens 51, a second lens 52, an aperture ST, a third lens 53, a fourth lens 54, a fifth lens 55, an infrared filter 56 and an imaging surface 57, wherein the configurations of the first lens 51, the second lens 52, the third lens 53, the fourth lens 54 and the fifth lens 55 of the imaging lens group 50 of the fourth embodiment are similar to the lenses of the imaging lens group 20 of the first to third embodiments described above.

[0154] The first lens 51 has negative refractive power and is made of glass. The first lens 51 is a convex-concave lens, which means that the object side surface 511 of the first lens 51 is convex, and the image side surface 512 of the first lens 51 is concave, wherein both the object side surface 511 and the image side surface 512 of the first lens 51 are spherical.

[0155] The second lens 52 has negative refractive power and is made of glass. The second lens 52 is a convex-concave lens, which means that the object side surface 521 of the second lens 52 is convex, and the image side surface 522 of the second lens 52 is concave, wherein both the object side surface 521 and the image side surface 522 of the second lens 52 are spherical surfaces.

[0156] The third lens 53 has positive refractive power and is made of glass. The third lens 53 is a biconvex lens, which means that the object side surface 531 and the image side surface 532 of the third lens 53 are both convex surfaces, wherein the object side surface 531 and the image side surface 532 of the third lens 53 are both spherical surfaces.

[0157] The fourth lens 54 has positive refractive power and is made of glass. The fourth lens 54 is a biconvex lens, which means that the object-side surface 541 and the image-side surface 542 of the fourth lens 54 are both convex surfaces, wherein the object-side surface 541 and the image-side surface 542 of the fourth lens 54 are both spherical surfaces.

[0158] The fifth lens 55 has negative refractive power and is made of glass. The fifth lens 55 is a meniscus lens, which means that the object side surface 551 of the fifth lens 55 is a concave surface, and the image side surface 552 of the fifth lens 55 is a convex surface, wherein the object side surface 551 and the image side surface 552 of the fifth lens 55 are both spherical surfaces, and the object side surface 551 of the fifth lens 55 and the image side surface 542 of the fourth lens 54 are glued together to form a composite lens.

[0159] The infrared filter 56 is made of glass and is disposed between the fifth lens 55 and the imaging surface 57 without affecting the focal length of the imaging lens assembly 50 .

[0160] Please refer to Table 1 and Table 2 below.

[0161]

[0162] Table 2: Aspheric coefficients of the fourth embodiment

[0163]

[0164]

[0165] Table 1 Fig. 10A Detailed structural data of the fourth embodiment, where the units of curvature radius, thickness, distance and focal length are mm, and surfaces 0-14 represent the surfaces from the object side to the image side in sequence. Table 2 is the aspheric surface data of the first embodiment, where k represents the cone coefficient in the aspheric curve equation, and A1-A12 represents the 1st-12th order aspheric surface coefficients of each surface.

[0166] According to Table 1 and Table 2, the following conditional equation values ​​can be obtained:

[0167]

[0168] According to Table 1 and Table 2, the following values ​​related to the length of the contour curve can be obtained:

[0169]

[0170]

[0171] Fifth embodiment

[0172] Please refer to Fig.11A and Fig. 11B ,in Fig.11A FIG. 4 is a schematic diagram showing the structure of an imaging lens assembly 60 according to a fifth embodiment of the present invention. Fig. 11B From left to right are the spherical aberration, astigmatism and optical distortion curves of the imaging lens assembly 60 of the fifth embodiment. Fig. 11C is a lateral aberration diagram of the imaging lens group 60 of the fifth embodiment at a field of view of 0.7. Fig.11A It can be seen that the imaging lens group 60 includes a first lens 61 , a second lens 62 , an aperture ST, a third lens 63 , a fourth lens 64 , a fifth lens 65 , an infrared filter 66 and an imaging surface 67 in order from the object side to the image side.

[0173] The first lens 61 has negative refractive power and is made of glass. The first lens 61 is a convex-concave lens, which means that the object side surface 611 of the first lens 61 is convex, and the image side surface 612 of the first lens 61 is concave, wherein both the object side surface 611 and the image side surface 612 of the first lens 61 are spherical.

[0174] The second lens 62 has negative refractive power and is made of glass. The second lens 62 is a convex-concave lens, which means that the object side surface 621 of the second lens 62 is convex, and the image side surface 622 of the second lens 62 is concave, wherein both the object side surface 621 and the image side surface 622 of the second lens 62 are spherical surfaces.

[0175] The third lens 63 has positive refractive power and is made of glass. The third lens 63 is a biconvex lens, which means that the object side surface 631 and the image side surface 632 of the third lens 63 are both convex surfaces, wherein the object side surface 631 and the image side surface 632 of the third lens 63 are both spherical surfaces.

[0176] The fourth lens 64 has positive refractive power and is made of glass. The fourth lens 64 is a biconvex lens, which means that the object-side surface 641 and the image-side surface 642 of the fourth lens 64 are both convex surfaces, and the object-side surface 641 and the image-side surface 642 of the fourth lens 64 are both spherical surfaces.

[0177] The fifth lens 65 has negative refractive power and is made of glass. The fifth lens 65 is a meniscus lens, which means that the object side surface 651 of the fifth lens 65 is a concave surface, and the image side surface 652 of the fifth lens 65 is a convex surface, wherein the object side surface 651 and the image side surface 652 of the fifth lens 65 are both spherical surfaces, and the object side surface 651 of the fifth lens 65 and the image side surface 642 of the fourth lens 64 are glued together to form a composite lens.

[0178] The infrared filter 66 is made of glass and is disposed between the fifth lens 65 and the imaging surface 67 without affecting the focal length of the imaging lens assembly 60 .

[0179] Please refer to Table 3 and Table 4 below.

[0180]

[0181] Table 4: Aspheric coefficients of the fifth embodiment

[0182]

[0183]

[0184] According to Table 3 and Table 4, the following conditional equation values ​​can be obtained:

[0185]

[0186] According to Table 3 and Table 4, the following values ​​related to the length of the contour curve can be obtained:

[0187]

[0188]

[0189] Sixth embodiment

[0190] Please refer to Fig. 12A and Fig. 12B ,in Fig. 12A FIG. 4 is a schematic diagram showing the structure of an imaging lens assembly 70 according to a sixth embodiment of the present invention. Fig. 12B From left to right are the spherical aberration, astigmatism and optical distortion curves of the imaging lens assembly 70 of the sixth embodiment. Fig. 12C The following are the lateral aberration diagrams of the meridian light fan and sagittal light fan of the imaging lens group 70 of the sixth embodiment, the longest working wavelength and the shortest working wavelength passing through the aperture edge at 0.7 field of view. Fig. 12A It can be seen that the imaging lens group 70 includes, from the object side to the image side, a first lens 71 , a second lens 72 , an aperture ST, a third lens 73 , a fourth lens 74 , a fifth lens 75 , an infrared filter 76 and an imaging surface 77 .

[0191] The first lens 71 has negative refractive power and is made of glass. The first lens 71 is a convex-concave lens, which means that the object-side surface 711 of the first lens 71 is convex, and the image-side surface 712 of the first lens 71 is concave, wherein both the object-side surface 711 and the image-side surface 712 of the first lens 71 are spherical.

[0192] The second lens 72 has negative refractive power and is made of glass. The second lens 72 is a convex-concave lens, which means that the object-side surface 721 of the second lens 72 is convex, and the image-side surface 722 of the second lens 72 is concave, wherein both the object-side surface 721 and the image-side surface 722 of the second lens 72 are spherical surfaces.

[0193] The third lens 73 has positive refractive power and is made of glass. The third lens 73 is a biconvex lens, which means that the object side surface 731 and the image side surface 732 of the third lens 73 are both convex surfaces, wherein the object side surface 731 and the image side surface 732 of the third lens 73 are both spherical surfaces.

[0194] The fourth lens 74 has positive refractive power and is made of glass. The fourth lens 74 is a biconvex lens, which means that the object-side surface 741 and the image-side surface 742 of the fourth lens 74 are both convex surfaces, wherein the object-side surface 741 and the image-side surface 742 of the fourth lens 74 are both spherical surfaces.

[0195] The fifth lens 75 has negative refractive power and is made of glass. The fifth lens 75 is a meniscus lens, which means that the object side surface 751 of the fifth lens 75 is a concave surface, and the image side surface 752 of the fifth lens 75 is a convex surface, wherein the object side surface 751 and the image side surface 752 of the fifth lens 75 are both spherical surfaces, and the object side surface 751 of the fifth lens 75 and the image side surface 742 of the fourth lens 74 are glued together to form a composite lens.

[0196] The infrared filter 76 is made of glass and is disposed between the fifth lens 75 and the imaging surface 77 without affecting the focal length of the imaging lens assembly 70 .

[0197] Please refer to Table 5 and Table 6 below.

[0198]

[0199] Table 6. Aspheric coefficients of the sixth embodiment

[0200]

[0201]

[0202] According to Table 5 and Table 6, the following conditional equation values ​​can be obtained:

[0203]

[0204] According to Table 5 and Table 6, the values ​​related to the length of the contour curve can be obtained:

[0205]

[0206]

[0207] Seventh embodiment:

[0208] Please refer to Fig.13A and Fig. 13B ,in Fig.13A FIG. 8 is a schematic structural diagram of an imaging lens assembly 80 according to a seventh embodiment of the present invention. Fig. 13B From left to right are the spherical aberration, astigmatism and optical distortion curves of the imaging lens assembly 80 of the seventh embodiment. Fig. 13C The following are the lateral aberration diagrams of the meridian light fan and sagittal light fan of the imaging lens group 80 of the sixth embodiment, the longest working wavelength and the shortest working wavelength passing through the aperture edge at 0.7 field of view. Fig.13A It can be seen that the imaging lens group 80 includes a first lens 81 , a second lens 82 , an aperture ST, a third lens 83 , a fourth lens 84 , a fifth lens 85 , an infrared filter 86 and an imaging surface 87 in order from the object side to the image side.

[0209] The first lens 81 has negative refractive power and is made of glass. The first lens 81 is a convex-concave lens, which means that the object side surface 811 of the first lens 81 is convex, and the image side surface 812 of the first lens 81 is concave, wherein both the object side surface 811 and the image side surface 812 of the first lens 81 are spherical.

[0210] The second lens 82 has negative refractive power and is made of glass. The second lens 82 is a convex-concave lens, which means that the object side surface 821 of the second lens 82 is convex, and the image side surface 822 of the second lens 82 is concave, wherein both the object side surface 821 and the image side surface 822 of the second lens 82 are spherical surfaces.

[0211] The third lens 83 has positive refractive power and is made of glass. The third lens 83 is a biconvex lens, which means that the object side surface 831 and the image side surface 832 of the third lens 83 are both convex surfaces, wherein the object side surface 831 and the image side surface 832 of the third lens 83 are both spherical surfaces.

[0212] The fourth lens 84 has positive refractive power and is made of glass. The fourth lens 84 is a biconvex lens, which means that the object-side surface 841 and the image-side surface 842 of the fourth lens 84 are both convex surfaces, wherein the object-side surface 841 and the image-side surface 842 of the fourth lens 84 are both spherical surfaces.

[0213] The fifth lens 85 has negative refractive power and is made of glass. The fifth lens 85 is a meniscus lens, which means that the object side surface 851 of the fifth lens 85 is a concave surface, and the image side surface 852 of the fifth lens 85 is a convex surface, wherein the object side surface 851 and the image side surface 852 of the fifth lens 85 are both spherical surfaces, and the object side surface 851 of the fifth lens 85 and the image side surface 842 of the fourth lens 84 are glued together to form a composite lens.

[0214] The infrared filter 86 is made of glass and is disposed between the fifth lens 85 and the imaging surface 87 without affecting the focal length of the imaging lens assembly 80 .

[0215] Please refer to Table 7 and Table 8 below.

[0216]

[0217] Table 8. Aspheric coefficients of the seventh embodiment

[0218]

[0219]

[0220] According to Table 7 and Table 8, the following conditional equation values ​​can be obtained:

[0221]

[0222] According to Table 7 and Table 8, the values ​​related to the length of the contour curve can be obtained:

[0223]

[0224]

[0225] Eighth embodiment:

[0226] Please refer to Fig.14A and Fig. 14B ,in Fig.14A FIG. 4 is a schematic diagram showing the structure of an imaging lens assembly 90 according to an eighth embodiment of the present invention. Fig. 14B From left to right are the spherical aberration, astigmatism and optical distortion curves of the imaging lens assembly 90 of the eighth embodiment. Fig. 14C The following are the lateral aberration diagrams of the meridian light fan and sagittal light fan of the imaging lens group 90 of the eighth embodiment, the longest working wavelength and the shortest working wavelength passing through the aperture edge at 0.7 field of view. Fig.14A It can be seen that the imaging lens group 90 includes a first lens 91 , an aperture ST, a second lens 92 , a third lens 93 , a fourth lens 94 , a fifth lens 95 , a sixth lens 96 , an infrared filter 97 and an imaging surface 98 in order from the object side to the image side.

[0227] The first lens 91 has negative refractive power and is made of plastic. The first lens 91 is a biconcave lens, which means that the object side surface 911 and the image side surface 912 of the first lens 91 are both concave surfaces, wherein the object side surface 911 and the image side surface 912 of the first lens 91 are both aspherical surfaces.

[0228] The second lens 92 has positive refractive power and is made of plastic. The second lens 92 is a biconvex lens, which means that the object side surface 921 and the image side surface 922 of the second lens 92 are both convex surfaces, wherein the object side surface 921 and the image side surface 922 of the second lens 92 are both aspherical surfaces.

[0229] The third lens 93 has negative refractive power and is made of plastic. The third lens 93 is a meniscus lens, which means that the object side surface 931 of the third lens 93 is concave, and the image side surface 932 of the third lens 93 is convex, wherein both the object side surface 931 and the image side surface 932 of the third lens 93 are aspherical.

[0230] The fourth lens 94 has positive refractive power and is made of plastic. The fourth lens 94 is a convex-concave lens, which means that the object side surface 941 of the fourth lens 94 is convex, and the image side surface 942 of the fourth lens 94 is concave, wherein both the object side surface 941 and the image side surface 942 of the fourth lens 94 are aspherical.

[0231] The fifth lens 95 has positive refractive power and is made of plastic. The fifth lens 95 is a biconvex lens, which means that the object side surface 951 and the image side surface 952 of the fifth lens 95 are both convex surfaces, wherein the object side surface 951 and the image side surface 952 of the fifth lens 95 are both aspherical surfaces.

[0232] The sixth lens 96 has negative refractive power and is made of plastic. The sixth lens 96 is a biconcave lens, which means that the object side surface 961 and the image side surface 962 of the sixth lens 96 are both concave surfaces, wherein the object side surface 961 and the image side surface 962 of the sixth lens 96 are both aspherical surfaces.

[0233] The infrared filter 97 is made of glass and is disposed between the sixth lens 96 and the imaging surface 98 without affecting the focal length of the imaging lens assembly 90 .

[0234] Please refer to Table 9 and Table 10 below.

[0235]

[0236] Table 10: Aspheric coefficients of the eighth embodiment

[0237]

[0238]

[0239] According to Table 9 and Table 10, the following values ​​related to the length of the contour curve can be obtained:

[0240]

[0241]

[0242] Ninth embodiment:

[0243] Please refer to Fig.15A and Fig. 15B ,in Fig.15A FIG. 4 is a schematic structural diagram of an imaging lens assembly 400 according to a ninth embodiment of the present invention. Fig. 15B From left to right are the spherical aberration, astigmatism and optical distortion curves of the imaging lens assembly 400 of the ninth embodiment. Fig. 15C is a lateral aberration diagram of the imaging lens assembly 400 of the ninth embodiment at a field of view of 0.7. Fig.15A It can be seen that the imaging lens group 400 includes, from the object side to the image side, a first lens 410 , a second lens 420 , a third lens 430 , an aperture ST, a fourth lens 440 , a fifth lens 450 , a sixth lens 460 , a seventh lens 470 , an infrared filter 480 and an imaging surface 490 .

[0244] The first lens 410 has negative refractive power and is made of plastic. The first lens 410 is a convex-concave lens, which means that the object side surface 4101 of the first lens 410 is convex, and the image side surface 4102 of the first lens 410 is concave, wherein both the object side surface 4101 and the image side surface 4102 of the first lens 410 are spherical.

[0245] The second lens 420 has negative refractive power and is made of plastic. The second lens 420 is a meniscus lens, which means that the object side surface 4201 of the second lens 420 is concave, and the image side surface 4202 of the second lens 420 is convex, wherein both the object side surface 4201 and the image side surface 4202 of the second lens 420 are spherical surfaces.

[0246] The third lens 430 has positive refractive power and is made of plastic. The third lens 430 is a biconvex lens, which means that the object side surface 4301 and the image side surface 4302 of the third lens 430 are both convex surfaces, wherein the object side surface 4301 and the image side surface 4302 of the third lens 430 are both spherical surfaces.

[0247] The fourth lens 440 has positive refractive power and is made of plastic. The fourth lens 440 is a biconvex lens, which means that the object side surface 4401 and the image side surface 4402 of the fourth lens 440 are both convex surfaces, wherein the object side surface 4401 and the image side surface 4402 of the fourth lens 440 are both spherical surfaces.

[0248] The fifth lens 450 has positive refractive power and is made of plastic. The fifth lens 450 is a biconvex lens, which means that the object side surface 4501 and the image side surface 4502 of the fifth lens 450 are both convex surfaces, wherein the object side surface 4501 and the image side surface 4502 of the fifth lens 450 are both spherical surfaces.

[0249] The sixth lens 460 has negative refractive power and is made of plastic. The sixth lens 460 is a biconcave lens, which means that the object-side surface 4601 and the image-side surface 4602 of the sixth lens 460 are both concave surfaces, wherein the object-side surface 4601 and the image-side surface 4602 of the sixth lens 460 are both spherical surfaces.

[0250] The seventh lens 470 has positive refractive power and is made of plastic. The seventh lens 470 is a biconvex lens, which means that the object-side surface 4701 and the image-side surface 4702 of the seventh lens 470 are both convex surfaces, wherein the object-side surface 4701 and the image-side surface 4702 of the seventh lens 470 are both spherical surfaces.

[0251] The infrared filter 480 is made of glass, and is disposed between the seventh lens 470 and the imaging surface 490 without affecting the focal length of the imaging lens assembly 400 .

[0252] Please refer to Table 11 and Table 12 below.

[0253]

[0254]

[0255] Table 12: Aspheric coefficients of the ninth embodiment

[0256]

[0257] According to Table 11 and Table 12, the following conditional equation values ​​can be obtained:

[0258]

[0259]

[0260] According to Table 11 and Table 12, the following values ​​related to the length of the contour curve can be obtained:

[0261]

[0262]

[0263] The temperature-adjustable optical imaging lens 100, 200, 300 of the present invention can be one of the groups consisting of electronic portable devices, electronic wearable devices, electronic monitoring devices, electronic information devices, electronic communication devices, machine vision devices, and automotive electronic devices, and can provide good imaging for both visible light and infrared light by using different numbers of lens groups as required.

[0264] Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

[0265] While the invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims and their equivalents.

Claims

1. A temperature-adjustable optical imaging lens, comprising: An imaging lens group, comprising at least five lenses with refractive power and an imaging surface, wherein the lenses are arranged in order from the object side to the image side as a first lens, a second lens, a third lens, a fourth lens and a fifth lens; An imaging lens assembly positioning element includes a lens seat, the lens seat is hollow and not light-transmissive, and the lens seat has a cylindrical portion inside for accommodating the imaging lens assembly; a heat conduction module, disposed in the barrel of the imaging lens assembly positioning element, the heat conduction module surrounds between the first lens and the second lens, and the heat conduction module contacts the first lens and the second lens; and a heating module, connected to the heat conduction module, for providing a heat source for the first lens and the second lens; The focal length of the imaging lens group is f, the entrance pupil diameter of the imaging lens group is HEP, half of the maximum viewing angle of the imaging lens group is HAF, there is a distance HOS from the object side of the first lens to the imaging surface, the intersection of any surface of any lens in the multiple lenses and the optical axis of the imaging lens group is taken as the starting point, along the contour of the surface to the coordinate point on the surface at a vertical height of 1 / 2 of the entrance pupil diameter from the optical axis of the imaging lens group, the length of the contour curve between the above two points is ARE, which satisfies the following conditions: 1.2≤f / HEP≤3.0; 1.5≤HOS / f≤10; 50deg<HAF≤100deg; and 0.1≤2(ARE / HEP)≤2.

0.

2. The temperature-adjustable optical imaging lens according to claim 1, wherein the heat-conducting module is a gasket made of a heat-conducting material, the gasket has an upper peripheral surface facing the first lens, and a lower peripheral surface facing the second lens, and the gasket has an inner ring hole penetrating the upper peripheral surface and the lower peripheral surface, and two sides of the inner ring hole form an upper edge located on the inner side of the upper peripheral surface, and a lower edge located on the inner side of the lower peripheral surface, wherein the gasket is placed on the second lens, and the second lens abuts against the lower edge, and the first lens abuts against the upper peripheral surface and is placed on the gasket.

3. The temperature-adjustable optical imaging lens as claimed in claim 2, wherein the upper surface of the lens has an annular convex portion and an abutting step portion, the annular convex portion surrounds the upper rim, and the first lens is placed on the annular convex portion, and the abutting step portion is recessed into the outer periphery of the annular convex portion.

4. The temperature-adjustable optical imaging lens as claimed in claim 3, wherein the heating module comprises an electric heating ring and a power connection portion, the electric heating ring is disposed on the upper surface of the gasket, and the electric heating ring is sleeved on the abutting step portion around the annular protrusion, so that the electric heating ring is located between the gasket and the first lens, and the power connection portion is connected to the electric heating ring and leads the barrel portion to be connected to an external power source.

5. The temperature-controllable optical imaging lens according to claim 2 or 3, wherein the first lens has a first optically effective area, and a first optically invalid area surrounding the first optically effective area; the second lens has a second optically effective area and a second optically invalid area, the second optically effective area faces the first optically effective area, and the second optically invalid area surrounds the second optically effective area, the gasket is disposed between the first optically invalid area and the second optically invalid area, and the inner annular hole of the gasket correspondingly conducts the first optically effective area and the second optically invalid area.

6. The temperature-adjustable optical imaging lens as claimed in claim 2, wherein the thermal conductivity of the gasket is between 200 W / mK and 400 W / mK, and the linear thermal expansion coefficient of the gasket is between 15×10 -6 / K to 30x10 -6 / K.

7. The temperature-adjustable optical imaging lens according to claim 1, wherein the length of the contour curve between the intersection of any surface of any lens in the plurality of lenses and the optical axis of the imaging lens group is ARE, which satisfies the following condition: 0.9≤2(ARE / HEP)≤2.0, and the intersection of any surface of any lens in the plurality of lenses and the optical axis of the imaging lens group is taken as a starting point, and the contour curve is traced along the contour of the surface to a coordinate point on the surface at a vertical height of 1 / 2 entrance pupil diameter from the optical axis of the imaging lens group.

8. The temperature-controllable optical imaging lens as claimed in claim 1, wherein the imaging lens group comprises six lenses with refractive power, and further comprises a sixth lens from the object side to the image side, the sixth lens is located between the fifth lens and the imaging plane, wherein a distance HOS is between the object side surface of the first lens and the imaging plane on the optical axis of the imaging lens group, and a distance InTL is between the object side surface of the first lens and the image side surface of the sixth lens on the optical axis of the imaging lens group, which satisfies the following condition: 0.1≤InTL / HOS≤0.

95.

9. The temperature-controllable optical imaging lens of claim 1 , wherein the imaging lens group comprises seven lenses having refractive power, and further comprises a sixth lens and a seventh lens in order from the object side to the image side, the sixth lens and the seventh lens are respectively located between the fifth lens and the imaging plane, wherein a distance HOS is defined between the object side surface of the first lens and the imaging plane on the optical axis of the imaging lens group, and a distance InTL is defined between the object side surface of the first lens and the image side surface of the seventh lens on the optical axis of the imaging lens group, which satisfies the following condition: 0.1≤InTL / HOS≤0.

95.

10. The temperature-adjustable optical imaging lens according to claim 1, wherein the TV distortion of the imaging lens group during imaging is TDT, the imaging lens group has a maximum imaging height HOI on the imaging plane perpendicular to the optical axis of the imaging lens group, the lateral aberration of the longest working wavelength of the visible light of the positive meridian light fan of the imaging lens group passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by PLTA, the lateral aberration of the shortest working wavelength of the visible light of the positive meridian light fan passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by PSTA, the lateral aberration of the longest working wavelength of the visible light of the negative meridian light fan passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by NLTA indicates that the lateral aberration of the shortest working wavelength of visible light of the negative meridian light fan passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by NSTA, the lateral aberration of the longest working wavelength of visible light of the sagittal light fan passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by SLTA, and the lateral aberration of the shortest working wavelength of visible light of the sagittal light fan passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by SSTA, which satisfies the following conditions: PLTA≤100 microns; PSTA≤100 microns; NLTA≤100 microns; NSTA≤100 microns; SLTA≤100 microns; and SSTA≤100 microns; │TDT│<100%.

11. The temperature-controllable optical imaging lens as claimed in claim 1, wherein the imaging lens group further comprises an aperture, and a distance InS is located between the aperture and the imaging plane on the optical axis of the imaging lens group, which satisfies the following condition: 0.2≤InS / HOS≤1.

1.

12. A temperature-adjustable optical imaging lens, comprising: An imaging lens group, comprising at least five lenses with refractive power and an imaging surface, wherein the lenses are arranged in order from the object side to the image side as a first lens, a second lens, a third lens, a fourth lens and a fifth lens; An imaging lens assembly positioning element includes a lens seat, the lens seat is hollow and not light-transmissive, and the lens seat has a cylindrical portion inside for accommodating the imaging lens assembly; a heat conduction module, disposed in the barrel of the imaging lens assembly positioning element, the heat conduction module surrounds between the first lens and the second lens, and the heat conduction module contacts the second lens; as well as a heating module, disposed on the heat conducting module and in contact with the first lens, for providing a heat source for the first lens and the second lens; The focal length of the imaging lens group is f, the entrance pupil diameter of the imaging lens group is HEP, half of the maximum viewing angle of the imaging lens group is HAF, there is a distance HOS from the object side of the first lens to the imaging surface, the intersection of any surface of any lens in the multiple lenses and the optical axis of the imaging lens group is taken as the starting point, along the contour of the surface to the coordinate point on the surface at a vertical height of 1 / 2 of the entrance pupil diameter from the optical axis of the imaging lens group, the length of the contour curve between the above two points is ARE, which satisfies the following conditions: 1.2≤f / HEP≤3.0; 1.5≤HOS / f≤10; 50deg<HAF≤100deg; and 0.1≤2(ARE / HEP)≤2.

0.

13. The temperature-adjustable optical imaging lens as claimed in claim 12, wherein the heat-conducting module is a gasket made of a heat-conducting material, the gasket has an upper peripheral surface facing the first lens, and a lower peripheral surface facing the second lens, and the gasket has an inner ring hole penetrating the upper peripheral surface and the lower peripheral surface, and two sides of the inner ring hole form an upper edge located on the inner side of the upper peripheral surface, and a lower edge located on the inner side of the lower peripheral surface, wherein the gasket is placed on the second lens, and the second lens abuts against the lower edge, the heating module is arranged on the upper peripheral surface of the gasket, and the first lens abuts against the heating module, whereby the heating module contacts the first lens and the gasket.

14. The temperature-adjustable optical imaging lens as claimed in claim 13, wherein the heating module comprises an electric heating ring and a power connection portion, the electric heating ring surrounds the inner ring hole corresponding to the upper edge, and the electric heating ring is positioned on the upper surface of the gasket by being abutted by the first lens, and the power connection portion is connected to the electric heating ring and leads the barrel to be connected to an external power source.

15. The temperature-controllable optical imaging lens as claimed in claim 14, wherein the first lens has a first optically effective area, and a first optically invalid area surrounding the first optically effective area; the second lens has a second optically effective area, and a second optically invalid area, the second optically effective area faces the first optically effective area, and the second optically invalid area surrounds the second optically effective area, the gasket is disposed between the first optically invalid area and the second optically invalid area, and the inner ring hole of the gasket is corresponding to conduct the first optically effective area and the second optically effective area, wherein the electric heating ring contacts the first optically invalid area of ​​the first lens.

16. The temperature-adjustable optical imaging lens of claim 13, wherein the thermal conductivity of the gasket is between 200 W / mK and 400 W / mK, and the linear thermal expansion coefficient of the gasket is between 15×10 -6 / K to 30x10 -6 / K.

17. The temperature-adjustable optical imaging lens according to claim 12, wherein the maximum effective radius of any surface of any lens in the plurality of lenses is represented by EHD, the intersection of any surface of any lens in the plurality of lenses and the optical axis of the imaging lens group is taken as a starting point, and the contour of the surface is taken along the contour to the maximum effective radius of the surface as an end point, and the contour curve length between the two points is ARS, which satisfies the following condition: 0.9≤ARS / EHD≤2.

0.

18. The temperature-adjustable optical imaging lens of claim 12, wherein the TV distortion of the imaging lens group during imaging is TDT, the imaging lens group has a maximum imaging height HOI perpendicular to the optical axis of the imaging lens group on the imaging plane, the lateral aberration of the longest working wavelength of the visible light of the positive meridian light fan of the imaging lens group passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by PLTA, the lateral aberration of the shortest working wavelength of the visible light of the positive meridian light fan passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by PSTA, the lateral aberration of the longest working wavelength of the visible light of the negative meridian light fan passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by The lateral aberration is represented by NLTA, the lateral aberration of the shortest working wavelength of visible light of the negative meridian light fan passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by NSTA, the lateral aberration of the longest working wavelength of visible light of the sagittal light fan passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by SLTA, and the lateral aberration of the shortest working wavelength of visible light of the sagittal light fan passing through the edge of the entrance pupil and incident on the imaging plane at 0.7HOI is represented by SSTA, which satisfies the following conditions: PLTA≤100 microns; PSTA≤100 microns; NLTA≤100 microns; NSTA≤100 microns; SLTA≤100 microns; and SSTA≤100 microns; │TDT│<100%.

19. The temperature-adjustable optical imaging lens as claimed in claim 12, wherein thicknesses of the first lens to the third lens on the optical axis of the imaging lens group are TP1, TP2, and TP3, respectively, which satisfy the following conditions: 0.6≤TP1 / TP2≤0.9 and 0.4≤TP2 / TP3≤0.

6.

20. The temperature-adjustable optical imaging lens of claim 12, wherein the imaging lens group comprises six lenses with refractive power, and further comprises a sixth lens from the object side to the image side, the sixth lens is located between the fifth lens and the imaging plane, wherein a distance HOS is between the object side surface of the first lens and the imaging plane on the optical axis of the imaging lens group, and a distance InTL is between the object side surface of the first lens and the image side surface of the sixth lens on the optical axis of the imaging lens group, which satisfies the following condition: 0.1≤InTL / HOS≤0.

95.

21. The temperature-controllable optical imaging lens of claim 12, wherein the imaging lens group comprises seven lenses with refractive power, further comprising a sixth lens and a seventh lens from the object side to the image side, the sixth lens and the seventh lens are respectively located between the fifth lens and the imaging plane, wherein a distance HOS is between the object side surface of the first lens and the imaging plane on the optical axis of the imaging lens group, and a distance InTL is between the object side surface of the first lens and the image side surface of the seventh lens on the optical axis of the imaging lens group, which satisfies the following condition: 0.1≤InTL / HOS≤0.

95.

22. The temperature-adjustable optical imaging lens of claim 12, wherein the temperature-adjustable optical imaging lens can be selected from the group consisting of electronic portable devices, electronic wearable devices, electronic monitoring devices, electronic information devices, electronic communication devices, machine vision devices, and automotive electronic devices.

23. A temperature-adjustable optical imaging lens, comprising: An imaging lens group, comprising at least five lenses with refractive power and an imaging surface, wherein the lenses are arranged in order from the object side to the image side as a first lens, a second lens, a third lens, a fourth lens and a fifth lens; An imaging lens assembly positioning element, comprising a lens seat, the lens seat is hollow and not light-transmissive, and the lens seat has a cylindrical portion inside for accommodating the imaging lens assembly; a heat conduction module, disposed in the barrel of the imaging lens assembly positioning element, the heat conduction module surrounds between the first lens and the second lens, and the heat conduction module contacts the second lens; as well as a heating module, connected to the heat conduction module, for providing a heat source for the first lens and the second lens; The focal length of the imaging lens group is f, the entrance pupil diameter of the imaging lens group is HEP, half of the maximum viewing angle of the imaging lens group is HAF, there is a distance HOS from the object side of the first lens to the imaging surface, the intersection of any surface of any lens in the multiple lenses and the optical axis of the imaging lens group is taken as the starting point, along the contour of the surface until the coordinate point on the surface at a vertical height of 1 / 2 of the entrance pupil diameter from the optical axis of the imaging lens group, the length of the contour curve between the above two points is ARE, the fourth lens and the fifth lens are bonded, which meet the following conditions: 1.6≤f / HEP≤2.31; 1.7≤HOS / f≤8.0; 60deg<HAF≤70deg; and 0.1≤2(ARE / HEP)≤2.

0.

24. The temperature-adjustable optical imaging lens as claimed in claim 23, wherein the heat-conducting module is a gasket made of a heat-conducting material, the gasket has an upper peripheral surface facing the first lens, and a lower peripheral surface facing the second lens, and the gasket has an inner ring hole penetrating the upper peripheral surface and the lower peripheral surface, and two sides of the inner ring hole form an upper edge located on the inner side of the upper peripheral surface, and a lower edge located on the inner side of the lower peripheral surface, wherein the gasket is placed on the second lens, and the second lens abuts against the lower edge.

25. The temperature-adjustable optical imaging lens as claimed in claim 24, wherein the heating module comprises an electric heating ring and a power connection portion, the electric heating ring surrounds the inner ring hole and contacts the gasket, and the power connection portion is connected to the electric heating ring and leads the barrel to be connected to an external power source.

26. The temperature-adjustable optical imaging lens as claimed in claim 25, wherein the upper surface of the lens has an annular convex portion and an abutting step portion, the annular convex portion surrounds the upper edge, and the first lens is placed on the annular convex portion, and the abutting step portion is recessed into the outer periphery of the annular convex portion, so that the electric heating ring is located between the gasket and the first lens, and the power connection portion is connected to the electric heating ring and leads the barrel portion to be connected to an external power source.

27. The temperature-adjustable optical imaging lens as claimed in claim 25, wherein the electric heating ring is fixed on the upper peripheral surface of the gasket corresponding to the upper edge, and the first lens is placed on the electric heating ring relative to the gasket.

28. The temperature-controllable optical imaging lens according to claim 26 or 27, wherein the first lens has a first optically effective area, and a first optically invalid area surrounding the first optically effective area; the second lens has a second optically effective area, and a second optically invalid area, the second optically effective area faces the first optically effective area, and the second optically invalid area surrounds the second optically effective area, the gasket is disposed between the first optically invalid area and the second optically invalid area, and the inner ring hole of the gasket is correspondingly connected to the first optically effective area and the second optically effective area, and the electric heating ring contacts the first optically invalid area of ​​the first lens.

29. The temperature-adjustable optical imaging lens as claimed in claim 25, wherein the electric heating ring is fixed to the lower circumference of the gasket corresponding to the lower edge, and the electric heating ring surrounds the second lens.

30. The temperature-adjustable optical imaging lens of claim 24, wherein the gasket is made of metal, the thermal conductivity of the gasket is between 200 W / mK and 400 W / mK, and the linear thermal expansion coefficient of the gasket is between 15×10 -6 / K to 30x10 -6 / K.

31. The temperature-controllable optical imaging lens as claimed in claim 23, wherein the first lens to the fifth lens are all made of glass.

32. The temperature-adjustable optical imaging lens as claimed in claim 23, wherein the thickness of the first lens on the optical axis of the imaging lens group is TP1, and the thickness of the second lens on the optical axis of the imaging lens group is TP2, which satisfies the following condition: 0.6≤TP1 / TP2≤0.

9.

33. The temperature-adjustable optical imaging lens as claimed in claim 23, wherein the thickness of the second lens on the optical axis of the imaging lens group is TP2, and the thickness of the third lens on the optical axis of the imaging lens group is TP3, which satisfies the following condition: 0.4≤TP2 / TP3≤0.

6.

34. The temperature-adjustable optical imaging lens as claimed in claim 23, wherein a distance between the first lens and the second lens on the optical axis of the imaging lens group is IN12, and satisfies the following condition: 0.9≤IN12 / f≤1.

1.

35. The temperature-adjustable optical imaging lens as claimed in claim 23, wherein the imaging lens group further comprises an aperture and an image sensing element, the image sensing element is disposed on the imaging surface, and there is a distance InS from the aperture to the imaging surface on the optical axis of the imaging lens group, which satisfies the following condition: 0.2≤InS / HOS≤1.1.

Images