Design of compact fisheye lens with slope-constrained Q-type aspheres

Chen Xu; Dewen Cheng; Weitao Song; Yongtian Wang; Qingfeng Wang

doi:10.1117/12.2023501

25 September 2013 Design of compact fisheye lens with slope-constrained Q-type aspheres

Chen Xu, Dewen Cheng, Weitao Song, Yongtian Wang, Qingfeng Wang

Proceedings Volume 8841, Current Developments in Lens Design and Optical Engineering XIV; 88410D (2013) https://doi.org/10.1117/12.2023501
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

Two types of fisheye lenses for automobile navigation are designed with slope-constrained Q-type aspheres. Special requirements have been considered in the design process, and Q-type surfaces are introduced by converted from other kinds of aspheric description with only coefficients of low-order terms retained. A possible problem of imaging the first surface onto the sensor has also been analyzed. As a result, as for the six-element fisheye lens, MTF is greater than 0.3 at 45lp/mm, f-θ distortion is less than 0.03 when the focal length is calibrated, field of view is 230° and full field relative illumination is greater than 0.4. For the four-element fisheye lens, MTF is greater than 0.4 at 45lp/mm, f-θ distortion is less than 0.16 , field of view is 190° and full field relative illumination is greater than 0.6. The design results show that the Q-type surfaces employed in fisheye lenses can make the system more compact, lightweighted and easier to manufacture.

Citation Download Citation

Chen Xu, Dewen Cheng, Weitao Song, Yongtian Wang, and Qingfeng Wang "Design of compact fisheye lens with slope-constrained Q-type aspheres", Proc. SPIE 8841, Current Developments in Lens Design and Optical Engineering XIV, 88410D (25 September 2013); https://doi.org/10.1117/12.2023501

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available