Accurate measurement of ST and CCI of camera lens with double light paths

Yongchai Yang

doi:10.1117/12.2294728

1 July 1990 Accurate measurement of ST and CCI of camera lens with double light paths

Yongchai Yang

Proceedings Volume 1230, International Conference on Optoelectronic Science and Engineering '90; 12302J (1990) https://doi.org/10.1117/12.2294728
Event: The Marketplace for Industrial Lasers 1990, 1990, Chicago, IL, United States

Abstract

The spectral transmittance (ST) and colour contribution index (CCI) are two important quality indexes of the colour camera lens. Automatic and accurate measurement of above indexes is imperative demand of factories which produce the colour camera lens. Because the instruments produced atpresent use single light path, they require long measuring time and are easily disturbed by voltage fluctuation and temperature variation so that the precision and stability are not idea. In order to improve the characteristics of the instrument, we have researched and produced the automaticmeasuring instrument with double light paths, whose precision and stability are higher than those of the same kind of instrument with single light path. This paper will discuss the following contents: the principle and adjusting technique for measuring ST and CCI with double light paths; the demodulating circuit and the automatic scanning circuit; the flowchart of program.

Citation Download Citation

Yongchai Yang "Accurate measurement of ST and CCI of camera lens with double light paths", Proc. SPIE 1230, International Conference on Optoelectronic Science and Engineering '90, 12302J (1 July 1990); https://doi.org/10.1117/12.2294728

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