Wide Angle Lens for Electro-Optical System

1988 ◽  
Vol 17 (4) ◽  
pp. 101-103
Author(s):  
P. N. Ageswara Rao ◽  
K. K. Banerjee ◽  
H. S. Singh
Keyword(s):  
Optical System ◽  
Wide Angle ◽  
Wide Angle Lens

Fisheye Lens Distortion Calibration Based on the Lens Charactetic Curves

2014 ◽  
Vol 519-520 ◽  
pp. 636-639
Author(s):  
Bao Long Zhang ◽  
Shao Jing Zhang ◽  
Wei Qi Ding ◽  
Hui Shuang Shi
Keyword(s):  
Optical System ◽  
Characteristic Curve ◽  
Calibration Method ◽  
Lens Distortion ◽  
Wide Angle ◽  
Forming Process ◽  
Fisheye Lens ◽  
Large Scope ◽  
Wide Angle Lens ◽  
Barrel Distortion

The fisheye lens is a kind of ultra wide angle lens, which can produce a big super-wide-angle lens distortion. In order to cover a large scope of light, barrel distortion is artificially added to the optical system. However, in some cases this distortion is not allowed, then it requires calibrations of those distortions. Most of the traditional distortion calibration method uses target plane calibration to do it. This paper discusses the way of design fisheye lens, through which we can know the forming process of distortion clearly. Based on this paper, a simple and effective calibration method can be understood. Different from common camera calibration method, the proposed calibration method can avoid the error occurring in the process of calibrating test, that directly use the lens’ characteristic curve. Through multiple sets of experimental verifications, this method is effective and feasible.

Developmental Risk Through a Wide-Angle Lens

1987 ◽  
Vol 32 (1) ◽  
pp. 54-55
Author(s):  
Jack P. Shonkoff
Keyword(s):  
Wide Angle ◽  
Developmental Risk ◽  
Wide Angle Lens

Wide-angle lens for miniature capsule endoscope

2006 ◽  
Author(s):  
Mang Ou-Yang ◽  
Yung-Lin Chen ◽  
Hsin-Hung Lee ◽  
Shih-chieh LU ◽  
Hsien-Ming Wu
Keyword(s):  
Capsule Endoscope ◽  
Wide Angle ◽  
Wide Angle Lens

Evaluating the Impact of Wide-Angle Lens Distortion on Learning-based Depth Estimation

2021 ◽  
Author(s):  
Julie Buquet ◽  
Jinsong Zhang ◽  
Patrice Roulet ◽  
Simon Thibault ◽  
Jean-Francois Lalonde
Keyword(s):  
Depth Estimation ◽  
Lens Distortion ◽  
Wide Angle ◽  
Wide Angle Lens ◽  
The Impact

Wide-angle zoom polarization imaging optical system design for physical evidence search

2019 ◽  
Vol 48 (4) ◽  
pp. 418006
Author(s):  
尹 骁 Yin Xiao ◽  
李英超 Li Yingchao ◽  
史浩东 Shi Haodong ◽  
江 伦 Jiang Lun ◽  
王 超 Wang Chao ◽  
...  
Keyword(s):  
System Design ◽  
Optical System ◽  
Wide Angle ◽  
Optical System Design ◽  
Polarization Imaging ◽  
Physical Evidence

A Wide-Angle, Linear-Output Horizon Sensor Optical System

1964 ◽  
Vol 3 (1) ◽  
pp. 63 ◽  
Author(s):  
William E. Palser
Keyword(s):  
Optical System ◽  
Wide Angle

scholarly journals Design of Wide Angle and Large Aperture Optical System with Inner Focus for Compact System Camera Applications

2019 ◽  
Vol 10 (1) ◽  
pp. 179 ◽  
Author(s):  
Hojong Choi ◽  
Jaemyung Ryu
Keyword(s):  
Optical System ◽  
High Speed ◽  
Resolving Power ◽  
Wide Angle ◽  
Phase Detection ◽  
Half Angle ◽  
Stepper Motors ◽  
Angle Of View ◽  
Floating Type ◽  
Focusing Lens

Conventionally, a bright, very wide-angle optical system is designed as a floating type optical system that moves two or more lens groups composed of multiple lens in order to focus accurately. These have been widely used as phase detection auto focus (AF) methods within conventional digital single-lens reflex (DSLR) cameras. However, a phase detection AF optical system cannot be used when recording motion pictures. In contrast, a compact system camera (CSC) performs AF by the contrast method, where a stepper motor is used as the driving source for moving the optical lens. Nonetheless, to ensure that the focusing lens is lighter, these stepper motors should not have high torque and AF must be possible by moving only one lens. Yet, when focusing is performed with only one lens, aberration change due to focusing lens movement is magnified. Therefore, a very wide-angle optical system comprised of a half-angle of view more than 40 degrees and F of 1/4 has not been developed. Here, a very wide-angle optical system was designed with high resolving power that enables high speed AF, even in contrast mode, by moving only one lens while minimizing aberration change.

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