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Laser imaging lens with large aperture

A laser imaging, large-aperture technology, applied in the field of imaging lenses, can solve the problems of unusable small-aperture receiving system and small field of view of reflective receiving system, and achieve the effect of convenient installation and debugging, convenient debugging, and ensuring the accuracy of installation and debugging

Inactive Publication Date: 2007-12-26
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the small-aperture receiving system cannot be used due to the insufficient caliber of the receiving lens due to the insufficient power of the transmitting laser under the condition of ensuring the imaging quality, and also solve the problem that the field of view of the reflective receiving system is too small problem, to provide a large aperture laser imaging lens for the lidar imaging system

Method used

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  • Laser imaging lens with large aperture
  • Laser imaging lens with large aperture
  • Laser imaging lens with large aperture

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The parameters of the first lens, second lens, third lens, fourth lens, and fifth lens of the large-aperture laser imaging lens are as follows:

[0034] f=118mm, F#=0.84, 2ω=10°

[0035] Surface number Radius Thickness Material index of refraction Diameter

[0036] OBJ Infinity Infinity 0

[0037] STO -117.21 15 1.4584 140

[0038] 2 -154.23 78.47 144

[0039] 3 588.35 17 1.4584 150

[0040] 4 -369.12 77.69 150

[0041] 5 197.64 20 1.4584 144

[0042] 6 65562.44 0 144

[0043] 7 102.66 20 1.4584 131.4

[0044] 8 187.9732 56.7 125.4

[0045] 9 59.09 30 1.4584 75.8

[0046] 10 103.05 35 55

[0047] Among them, OBJ means the object plane, STO means the stop plane, infinity means infinity, and the lens planes arranged in sequence from 2 to 10. f is the focal length of the entire lens, F# is the F number, and 2ω is the field of view.

[0048] Fig. 1 is the schematic cross-sectional view of main optical path of the present invention, and it represents a kind of st...

Embodiment 2

[0055] The parameters of the first lens, second lens, third lens, fourth lens, and fifth lens of the large-aperture laser imaging lens are as follows:

[0056] f=118mm, F#=0.84, 2ω=10°

[0057] Surface number Radius Thickness Material index of refraction Diameter

[0058] OBJ Infinity Infinity 0

[0059] STO -115.28 15 1.4584 140

[0060] 2 -157.55 91.34 144

[0061] 3 2030.74 17 1.4584 150

[0062] 4 -290.09 52.20 150

[0063] 5 263.23 20 1.4584 144

[0064] 6 -2497.42 0 144

[0065] 7 130.33 20 1.4584 131.4

[0066] 8 268.16 47.96 125.4

[0067] 9 76.35 61.40 1.4584 75.8

[0068] 10 146.23 35 55

[0069] Among them, OBJ means the object plane, STO means the stop plane, infinity means infinity, and the lens planes arranged in sequence from 2 to 10. f is the focal length of the entire lens, F# is the F number, and 2ω is the field of view.

[0070] By increasing the receiving aperture of the optical system, the invention achieves the purpose of receiving sufficient...

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Abstract

A laser imaging lens of heavy-bore type is prepared for setting negative optical diopter of the first lens, positive optical diopter of the second lens, positive optical diopter of the third lens, positive optical diopter of the fourth lens and positive optical diopter of fifth lens in sequence along the same optical axis from object end to imaging end, applying meniscus lens with light-through bore of 140-150mm as the first lens, utilizing fused quarts as material of all said lens and setting combined focal length of each lens to be satisfied with condition of f x tanw=ap.

Description

technical field [0001] The invention relates to an imaging lens, in particular, a large-diameter laser imaging lens used in a laser radar imaging system. Get the shape and distance of the illuminated object. Background technique [0002] The imaging lens of the lidar imaging system is mainly used to receive the laser light reflected back from the object, and obtain the image of the object and the distance of the object by receiving the reflected laser light for imaging. With the development of laser technology and optical processing technology, there are more and more such applications. However, due to the limitations of optical design and processing technology and receiver size, large-aperture laser imaging lenses often use reflective structures. This structure often has a focal length It is long, has a small field of view, is difficult to manufacture, and has high cost. At the same time, it cannot obtain the desired effect at close range on the ground, so this reflective ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B9/60G02B1/02
Inventor 陈卫华朱健强
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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