97results about How to "High relative illuminance" patented technology

The invention discloses an optical imaging lens, and the lens sequentially comprises a first lens, a second lens, a third lens and a fourth lens from the object space to the image space along an optical axis. The first lens has the negative focal power. The second lens has the positive focal power. At least one of the second lens and the fourth lens has the positive focal power. The central thickness CT2 of the second lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis meet a formula: CT2/CT4<0.5.

The invention discloses an optical lens group. The optical lens group sequentially comprises from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens and a fifthlens. By designing the concave-convex configuration of the surfaces of the five lenses and controlling related parameters, the overall length of the optical lens group is shortened, the imaging quality is improved, and the optical lens group has good chromatic aberration correction and image bending capability.

The invention discloses an optical lens and an imaging device which comprises the optical lens. The optical lens comprises a first lens, a second lens, a third lens and a fourth lens in order from theobject side to the image side along an optical axis. The first lens is a meniscus lens with positive focal power or negative focal power. The second lens has positive focal power, and the object sideis a convex surface. The third lens has positive focal power, wherein the object side thereof is a concave surface, and the image side thereof is a convex surface. The fourth lens has negative focalpower, wherein the object side thereof is a convex surface, and the image side thereof is a concave surface. According to the optical lens provided by the invention, at least one of high effects suchas high resolution, miniaturization, good temperature performance, back focal length, small front end diameter and high contrast can be achieved.

The invention discloses a low-distortion optical system and a lens, and the optical system comprises a first lens having positive focal power, a second lens having negative focal power and arranged at intervals relative to the first lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and a photosensitive chip which are sequentially arranged from an object side to an image side, wherein the third lens has negative focal power, and the third lens and the second lens are arranged at intervals; the diaphragm and the third lens are arranged at intervals and the diaphragm is used for limiting the aperture of the light beam; the fourth lens has positive focal power, and the fourth lens and the diaphragm are arranged at intervals; the fifth lens has negative focal power, and the fifth lens and the fourth lens form a cemented lens; the sixth lens has positive focal power, and the sixth lens and the fifth lens are arranged at an interval; the seventh lens has positive focal power, and the seventh lens and the sixth lens are arranged at intervals; and the photosensitive chip and the seventh lens are arranged at intervals, and the photosensitive chip is used for capturing an imaging signal and forming an image. By arranging lens combinations of different structures and reasonably distributing the focal power of each lens, low distortion and high relative illumination of the optical system are realized while high-definition resolution is obtained.

The invention provides a small fisheye lens with high resolution and application thereof. A first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a filter disc and an image plane IMA are sequentially arranged in the incident direction of an optical axis; the first lens has negative focal power, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens has negative focal power, the object side surface of the second lens is a convex surface, and the image side surface is a concave surface; the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface is a convex surface or a concave surface; the fourth lens has positive focal power, the object side surface of the fourth lens is a convex surface, and the image side surface is a convex surface or a concave surface; the fifth lens has negative focal power, the object side surface of the fifth lens is a concave surface, and the image side surface is a concave surface or a convex surface; the sixth lens has positive focal power, the object side surface of the sixth lens is a convex surface, and the image side surface is a convex surface; the structure is simple, miniaturization of the lens module is facilitated, the cost is low, the lens has high resolution and clear imaging, and meanwhile the lens has high relative illumination and better image illumination uniformity.

The invention discloses a high-resolution floating focusing system suitable for different object distances, and the system comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with negative focal power, which are sequentially arranged from the object side to the phase side. The second lens has positive focal power, and the second lens and the first lens are arranged at an interval; the third lens has negative focal power, and the third lens and the second lens form a cemented lens; a diaphragm; the fourth lens has negative focal power, and the fourth lens and the diaphragm are arranged at an interval; the fifth lens has positive focal power, and the fifth lens and the fourth lens are arranged at an interval; the sixth lens has positive focal power, and the sixth lens and the fifth lens are arranged at an interval; a seventh lens; the eighth lens has negative focal power, and the eighth lens and the seventh lens form a cemented lens; and the photosensitive chip is used for capturing the imaging signal and forming an image. By arranging lens combinations of different structures and reasonably distributing the focal power of each lens, high-resolution images under different object distances are obtained, and the lenses of the front group and the rear group of the system are separated by a certain distance in front of and behind the diaphragm, so that adjustment of a floating focusing mechanism in structure is facilitated.

The invention relates to a large-area array dynamic monitoring and measuring camera optical system. The large-area array dynamic monitoring and measuring camera optical system is composed of anti-radiation window glass, 12 spherical lenses and a large-area array receiver; surveying and mapping target radiation beams which fully fill the entrance pupil of the optical system enters the optical system through an anti-radiation window; and an approximate telecentric optical path inverted telephoto structure is adopted to obtain low-distortion and high-illumination image information at a focal plane. According to the invention, the approximate telecentric optical system is adopted, namely, the emergent main light ray angles of fields of view are approximately parallel, and gamma is approximately equal to 0.1; a designed transfer function can achieve diffraction limits, and at the same time, can satisfy requirements for low distortion and high illumination. The large-area array dynamic-monitoring measuring camera optical system of the invention has the advantages of wide angle, being approximately telecentric, low distortion, excellent relative illumination, high engineering feasibility, high integration degree of an optical machine structure, excellent temperature adaptability and the like. The focal power of four lens groups is reasonably optimized, so that large-format, high-resolution and image plane-uniform imaging of a target scene can be realized.

The invention discloses a fixed-focus optical system, which comprises a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens and a hpotosensitive chip which are sequentially arranged from an object side to a phase side; the first lens has positive focal power; the second lens has negative focal power, and the second lens and the first lens are arranged at an interval; the third lens has positive focal power, and the third lens and the second lens are arranged at an interval; the fourth lens has positive focal power, and the fourth lens and the third lens are arranged at an interval; the diaphragm and the fourth lens are arranged at an interval and the diaphragm is used for limiting the aperture of the light beam; the fifth lens has negative focal power, and the fifth lens and the diaphragm are arranged at an interval; the sixth lens has positive focal power, and the sixth lens and the fifth lens form a cemented lens; the seventh lens has positive focal power, and the seventh lens and the sixth lens are arranged at an interval; and the photosensitive chip and the seventh lens are arranged at an interval, and the photosensitive chip is used for capturing an imaging signal and forming an image. By arranging lens combinations of different structures and reasonably distributing the focal power of each lens, low distortion and high relative illumination of the optical system are realized while high-definition resolution is obtained.

The invention relates to a wide-angle lens with low distortion and high relative illumination. A front mirror group A, a rear mirror group B and a fixed diaphragm between the front mirror group A andthe rear mirror group B are arranged in order from the left to the right in the incident direction of light. The front mirror group A comprises a first meniscus positive lens, a first meniscus negative lens, a first double convex positive lens, a first double concave negative lens and a second double convex positive lens. The rear mirror group B comprises a second meniscus positive lens, a secondmeniscus negative lens, a third double convex positive lens, a fourth double convex positive lens and a third meniscus negative lens. The invention further relates to a working method of the wide-angle lens with low distortion and high relative illumination. The wide-angle lens provided by the invention has the advantages of reasonable structure, simple operation, low distortion and high relativeillumination.

The invention provides an optical lens, a manufacturing method of the optical lens and an optical imaging device. The optical lens includes: a lens substrate; an anti-reflection film system which is arranged on at least one surface of the lens substrate, wherein the anti-reflection film system comprises a plurality of high-refractive-index film layers and a plurality of low-refractive-index film layers, the high-refractive-index film layers and the low-refractive-index film layers are alternately stacked and the low-refractive-index film layers are in contact with air, and the reflectivity ofthe optical lens to light with the wavelength larger than or equal to 600 nanometers and smaller than or equal to 730 nanometers is smaller than 2%. The problem that the optical lens in the prior artis poor in antireflection effect is solved.

The invention discloses a high-resolution ultralow-distortion optical system and a lens, and the optical system comprises a first lens which has negative focal power; the second lens has positive focal power, and the second lens and the first lens are arranged at an interval; the third lens has negative focal power, and the third lens and the second lens are arranged at an interval; the fourth lens has negative focal power; the fifth lens has positive focal power; the sixth lens has positive focal power; the seventh lens has negative focal power; a diaphragm; the eighth lens has negative focal power, and the eighth lens and the diaphragm are arranged at an interval; the ninth lens has positive focal power; the tenth lens has positive focal power; an eleventh lens having positive focal power; the twelfth lens has positive focal power; the thirteenth lens has negative focal power; and the photosensitive chip is used for capturing the imaging signal and forming an image. By arranging lens combinations of different structures and reasonably distributing the focal power of each lens, low distortion and high relative illumination of the optical system are realized while high-definition resolution is obtained.

The invention discloses a zoom projection optical system, which comprises the following components which are sequentially arranged from an object side to an image side: a first lens group G1 which is fixed during zooming and has negative focal power; a second lens group G2 which can move along the direction of the optical axis, has positive focal power and is used for focusing different object distances; a third lens group G3 which can move along the optical axis direction and has positive focal power; a fourth lens group G4 which can move along the optical axis direction and has positive focal power; a diaphragm group STO which can move along the optical axis direction; a fifth lens group G5 which can move along the direction of the optical axis and has negative focal power; a sixth lens group G6 which can move along the direction of the optical axis and has positive focal power; a seventh lens group G7 which is fixed during zooming and has positive focal power; the zoom projection optical system has a constant Fno, and on the premise that the Fno is constant in the zoom process, the focal length is 17.68 mm to 28.28 mm, the zoom ratio is 1.6 *, the optical distortion is smaller than 1.3%, and the relative illumination is larger than 70%.

The invention discloses an optical lens, a camera module, an electronic device and an automobile. The optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged along an optical axis from an object side to an image side. The first lens has positive refractive power, the object side surface and the image side surface of the first lens are a convex surface and a concave surface near the optical axis respectively. The second lens has negative refractive power, and an object-side surface and an image-side surface thereof are concave in a paraxial region. The third lens has positive refractive power, and an image-side surface thereof is convex in a paraxial region. The fourth lens has negative refractive power, and has a convex object-side surface and a concave image-side surface in paraxial regions, respectively. The fifth lens has positive refractive power, and an object-side surface and an image-side surface thereof are convex in a paraxial region. The sixth lens has refractive power, and has a convex object-side surface and a concave image-side surface in paraxial regions, respectively. According to the optical lens, the characteristics of small distortion and large aperture of the optical lens can be achieved, and the imaging quality requirement of the optical lens is effectively met.

The invention provides an optical imaging lens. The optical imaging lens sequentially comprises a first lens, a second lens, a third lens and a fourth lens from the object side to the image side of the optical imaging lens, wherein the object-side surface of the third lens is a concave surface, and the image-side surface of the third lens is a convex surface; the fourth lens has negative focal power; the maximum effective radius DT11 of the object-side surface of the first lens and the aperture value fno of the optical imaging lens meet the following condition: 0.3 mm < DT11/fno < 0.5 mm; and the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the following condition: f/EPD < 2. The problem that a lens in the prior art is difficult to miniaturize is solved.

The present invention discloses an optical lens. The optical lens may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in sequence from an object side to an image side along an optical axis, wherein, the first lens may have a positive focal power, a convex object side surface and a concave image side surface; the second lens may have a negative focalpower, a convex object side surface and a concave image side surface; the third lens may have a negative focal power, concave object side surface and image side surface; the fourth lens may have a positive power, convex object side surface and image side surface; the fifth lens may have a positive focal power; and the sixth lens may have a negative focal power, a concave object side surface and aconvex image side surface. The optical lens of the invention can realize at least one of beneficial effects of miniaturization, small FNO, good temperature performance, low cost, and high relative illuminance.