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CN-116609921-B - Low-light level high-definition optical lens

CN116609921BCN 116609921 BCN116609921 BCN 116609921BCN-116609921-B

Abstract

The invention provides a low-light level high-definition optical lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an optical filter and a photosensitive chip which are sequentially arranged from an object plane to an image plane along an optical axis, wherein the first lens to the tenth lens are all glass spherical lenses, the focal length of the first lens to the tenth lens is positive, negative, positive, negative and the like in sequence, and the lens FNo. reaches 1.4 only through the matching use of 10 glass lenses, so that high and low temperature (high temperature +85 ℃ and low temperature-40 ℃) virtual focus free can be realized, and as the number of the lens lenses is reduced to 10 from 14 lenses, 4 lens spaces are reduced, and the space occupied by optical components is greatly reduced.

Inventors

  • LIU ZHENQUAN
  • DING YIXUAN
  • LI MENGHUAN
  • DING SONGTAO
  • WEI SHUGUI

Assignees

  • 河南翊轩光电科技有限公司

Dates

Publication Date
20260505
Application Date
20230524

Claims (8)

  1. 1. The low-light level high-definition optical lens is characterized by comprising a first lens (1), a second lens (2), a third lens (3), a fourth lens (4), a fifth lens (5), a sixth lens (6), a seventh lens (7), an eighth lens (8), a ninth lens (9), a tenth lens (10), an optical filter (12) and a photosensitive chip (13), which are sequentially arranged from an object plane to an image plane along an optical axis, wherein the first lens (1) to the tenth lens (10) are all glass spherical lenses, and the focal lengths of the first lens (1) to the tenth lens (10) are sequentially positive, negative, positive and negative; The center thicknesses of the first lens (1), the second lens (2), the third lens (3), the fourth lens (4), the fifth lens (5), the sixth lens (6), the seventh lens (7), the eighth lens (8), the ninth lens (9) and the tenth lens (10) are respectively 4.8mm, 5.7mm, 1.00mm, 7.80mm, 7.13mm, 13.00mm, 4.35mm, 5.99mm and 1.00mm.
  2. 2. The low-light level high-definition optical lens according to claim 1, wherein the second lens (2), the fifth lens (5) and the ninth lens (9) are all made of ultra-low dispersion materials.
  3. 3. The low-light level high-definition optical lens according to claim 1, wherein the first lens (1), the third lens (3) and the eighth lens (8) are all made of high refractive index materials.
  4. 4. The low-light level high-definition optical lens according to claim 1, wherein a diaphragm (11) for restricting a light beam is provided between the fifth lens (5) and the sixth lens (6).
  5. 5. The low-light level high-definition optical lens according to claim 1, wherein the first lens (1) and the second lens (2), the third lens (3) and the fourth lens (4), the sixth lens (6) and the seventh lens (7), the seventh lens (7) and the eighth lens (8), the eighth lens (8) and the ninth lens (9) have a pitch of 13.07mm, 5.37mm, 1.34mm, 0.09mm, 0.11mm, respectively.
  6. 6. The low-light level high-definition optical lens according to claim 1, wherein the radii of curvature of the object surfaces of the first lens (1), the second lens (2), the third lens (3), the fourth lens (4), the fifth lens (5), the sixth lens (6), the seventh lens (7), the eighth lens (8), the ninth lens (9) and the tenth lens (10) are 51.77mm, 20.68mm, 347.80mm, -30.77mm, 18.34mm, 107.80mm, -28.29mm, 45.82mm, 28.33mm, -49.39mm, respectively.
  7. 7. The low-light level high-definition optical lens as claimed in claim 6, wherein the first lens (1), the second lens (2), the third lens (3), the fourth lens (4), the fifth lens (5), the sixth lens (6), the seventh lens (7), the eighth lens (8), the ninth lens (9) and the tenth lens (10) have radii of curvature on the image plane side of 173.50mm, 347.80mm, 18.06mm, 18.34mm, -32.21mm, -107.80mm, -24.25mm, -268.99mm, -49.39mm and 17.82mm, respectively.
  8. 8. The low-light level high-definition optical lens according to claim 1, wherein the second lens (2) and the third lens (3), the fourth lens (4) and the fifth lens (5), and the ninth lens (9) and the tenth lens (10) are combined to form a cemented lens for eliminating chromatic aberration.

Description

Low-light level high-definition optical lens Technical Field The invention relates to the technical field of optical lenses, in particular to a low-light level high-definition optical lens. Background In recent years, with the continuous development of network technology, the advance of urban and intelligent traffic projects has been accompanied by higher demands for resolution, high-power zoom, object resolution under low light and strong light, large visual field, fog penetration, anti-shake technology and the like of optical lenses, and the demands have been on the trend of high-end and intelligent. The expansion of the optical lens market not only brings huge power for the industry, but also promotes the continuous improvement of the optical lens demand, and new technical demands are also continuously appearing. The characteristics of high resolution, infrared confocal, large wide angle, large aperture, corrosion resistance, capability of bearing severe environment and the like of the lens form the primary condition of being used as a security monitoring lens. In the prior art, in order to meet the requirements of a micro-light high-definition lens, the lens has no virtual focus at high and low temperatures (high temperature +80 ℃ and low temperature-40 ℃), the total number of glass lenses is more than 14, the product resolution is poor, the yield after assembly is low, and the effect is not ideal in the high-end field. Disclosure of Invention In view of this, the invention provides a low-light level high-definition optical lens, which can realize no virtual focus at high and low temperatures (high temperature +85 ℃ and low temperature-40 ℃) by only matching 10 glass lenses. In order to achieve the above purpose, the present invention provides a low-light level high-definition optical lens, which adopts the following technical scheme: A low-light level high-definition optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an optical filter and a photosensitive chip which are sequentially arranged from an object plane to an image plane along an optical axis, the first lens to the tenth lens are all glass spherical lenses, the focal lengths of the first lens to the tenth lens are positive in sequence positive, negative, positive, negative, positive. The design of the glass aspheric lens is that the number of lens is reduced to 10, the lens FNo. can reach 1.4 by only matching 10 glass lenses, and no virtual focus at high and low temperature (high temperature +85 ℃ and low temperature-40 ℃) can be realized, and the space of 4 lenses is reduced because the number of lens is reduced to 10 from the previous 14 lenses, the space occupied by an optical component is greatly reduced! Further, the first lens, the third lens and the eighth lens are all made of high refractive index materials. Through the technical scheme, the use of the high-refractive-index material lens can effectively correct spherical aberration and coma aberration, so that residual spherical aberration and coma aberration of the lens are small. Further, the second lens, the fifth lens and the ninth lens are all made of ultra-low dispersion materials. By the technical scheme, the introduction of the ultra-low dispersion material lens effectively reduces the axial chromatic aberration of the optical system; the aberration such as spherical aberration, coma aberration, astigmatism, field curvature and the like can be effectively corrected, so that the resolution quality of the lens is improved, and the ideal resolution is achieved. Further, a diaphragm for limiting the light beam is arranged between the fifth lens and the sixth lens. By the technical scheme, the lenses near the diaphragm are arranged in an approximately symmetrical optical structure, so that chromatic aberration is further reduced, infrared confocal effect is achieved, and infrared defocus amount is 0.006mm. Further, the center thicknesses of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens and the tenth lens are 4.8mm, 5.7mm, 1.00mm, 7.80mm, 7.13mm, 13.00mm, 4.35mm, 5.99mm and 1.00mm, respectively. Further, the pitches between the first and second lenses, the third and fourth lenses, the sixth and seventh lenses, the seventh and eighth lenses, the eighth and ninth lenses are 13.07mm, 5.37mm, 1.34mm, 0.09mm, 0.11mm, respectively. Further, the radii of curvature of the object side of the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth and tenth lenses are 51.77mm, 20.68mm, 347.80mm, -30.77mm, 18.34mm, 107.80mm, -28.29mm, 45.82mm, 28.33mm, -49.39mm, respectively. Further, the radii of curvature of the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth lens image sides are 173.50mm, 347.80mm, 18.06mm, 18.34mm, -32.21mm, -107.80mm