Lens Design of Low Light Level Night Vision Objective Optical System

2014 ◽  
Vol 568-570 ◽  
pp. 1778-1781
Author(s):  
Yu Chen ◽  
Chun Hong Hu ◽  
Yan Chun Luo ◽  
Ping Wang
Keyword(s):  
Optical System ◽  
Vision System ◽  
Optical Design ◽  
Light Level ◽  
Night Vision ◽  
Objective Lens ◽  
Lens Design ◽  
Low Light ◽  
Working Principle ◽  
Design Software

This paper discussed the working principle of the LLL night vision(low-light level night vision)device and researched into the LLL night vision objective opjective optical system.An LLL night vision objective optical system with good image quality is finally got,which comes after debugging with the optical design software ZEMAX according to the theoretical calculation of the objective lens parameters specific to night vision system.

Analysis on Spectrum Response and Visual Range of Low Light Level Night Vision System Under Laser Illuminate

2010 ◽  
Vol 37 (1) ◽  
pp. 312-315
Author(s):  
刘伟 Liu Wei ◽  
付江涛 Fu Jiangtao ◽  
常本康 Chang Benkang
Keyword(s):  
Vision System ◽  
Light Level ◽  
Night Vision ◽  
Low Light ◽  
Visual Range ◽  
Spectrum Response

Tunable-liquid-crystal-filter-based low-light-level color night vision system and its image processing method

2019 ◽  
Vol 58 (18) ◽  
pp. 4947
Author(s):  
Tao Yuan ◽  
Zhenghao Han ◽  
Li Li ◽  
Weiqi Jin ◽  
Xia Wang ◽  
...  
Keyword(s):  
Image Processing ◽  
Liquid Crystal ◽  
Vision System ◽  
Light Level ◽  
Processing Method ◽  
Night Vision ◽  
Low Light ◽  
Image Processing Method ◽  
Color Night Vision

The Camera Lens Design of 3D Low Light Level Color Night Vision System

2014 ◽  
Vol 568-570 ◽  
pp. 598-603
Author(s):  
Juan Li ◽  
Zhao Hui Liu ◽  
Chao Mei
Keyword(s):  
Vision System ◽  
Focal Length ◽  
Spectral Band ◽  
Chromatic Aberration ◽  
Light Level ◽  
Night Vision ◽  
Low Light ◽  
Camera Lens ◽  
Good Imaging ◽  
Color Night Vision

Two camera lenses for 3D low light level color night vision system are designed in CODE V. The panchromatic sensitive camera lens works in a wide spectral band 400nm-1000nm, yellow green-sensitive camera lens works in a band of 400nm-600nm.The two camera lenses have same parameters, such as focal length 120mm, relative aperture 1/2, the field angle of 5.26 °. In the design of two camera lenses, we split and complex cooke triplet lens, the chromatic aberration is balanced by adding a binary diffractive surface. The results of design show that sensitive panchromatic camera lens and yellow-green-sensitive camera lens, in the all field of view, when the Nyquist frequency is 77.5 (lp / mm), all MTF is larger than 0.6; the axial chromatic aberration of sensitive panchromatic camera lens is 0.056mm. Two camera lenses have good imaging performance.

A Comparison of Visual Acuity Performance between a Binocular Night Vision Goggle and Two Types of Monocular Night Vision Goggles

1980 ◽  
Vol 24 (1) ◽  
pp. 306-309
Author(s):  
Robert M. Waters ◽  
Larry W. Avery
Keyword(s):  
Visual Acuity ◽  
Depth Perception ◽  
Low Cost ◽  
Light Level ◽  
Night Vision ◽  
Low Light ◽  
Light Intensification

Two experiments were run comparing the operational binoculars AN/PVS-5 Night Vision Goggles with two monocular low cost night vision goggles using newer light intensification techniques. No decrement in performance was noted in visual acuity or depth perception with the monocular low cost goggles; an improved capability was noted with the new goggles in low light level conditions.

Low light level CMOS sensor for night vision systems

2015 ◽  
Author(s):  
Elad Gross ◽  
Ran Ginat ◽  
Ofer Nesher
Keyword(s):  
Light Level ◽  
Night Vision ◽  
Vision Systems ◽  
Low Light ◽  
Cmos Sensor

Design of Projection Lithography Objective Lens with Sub-Ten Micrometer Line-Width and its MTF Experimental Measurements

2014 ◽  
Vol 901 ◽  
pp. 111-115
Author(s):  
Liang Lei ◽  
Xin Liu ◽  
Lang Lin Li ◽  
Jin Yun Zhou
Keyword(s):  
Wave Length ◽  
Optical Design ◽  
Field Of View ◽  
Objective Lens ◽  
Modulation Transfer ◽  
Projection Lithography ◽  
Fold Reduction ◽  
Result Show ◽  
Design Software ◽  
Imaging Performance

Double fold reduction projection lithography objective lens with bi-telecentric configuration, consists of 6 lenses and the number aperture , is designed based on the optical design software Zemax. It uses the 405nm laser diode (LD) as light source. The spatial resolving capacity approaches to 5um. In a field of view of , its wave-front aberration is less than a quarter of wave-length and the distortion ratio is not more than. The imaging performance, in particular, the accurate modulation transfer function (MTF) value of the projection objective lens being fabricated by experiments is determined in this paper. Through analyzing the noise disturbance law in MTF tests, the result show that the projection objective lens has sub ten micrometer resolving ability.

Digital simulation for low-light-level night vision imaging system

2000 ◽  
Author(s):  
Tingzhu Bai ◽  
Na Li ◽  
Zhengfeng Zou ◽  
Hansheng Lu ◽  
Guangjian Yan
Keyword(s):  
Imaging System ◽  
Digital Simulation ◽  
Light Level ◽  
Night Vision ◽  
Low Light
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