A Variable Intensity Electroluminescence Standard For Video Microscopy

Dennis J. O'Kane; John E. Wampler

doi:10.1117/12.962700

22 December 1989 A Variable Intensity Electroluminescence Standard For Video Microscopy

Dennis J. O'Kane, John E. Wampler

Proceedings Volume 1161, New Methods in Microscopy and Low Light Imaging; (1989) https://doi.org/10.1117/12.962700
Event: 33rd Annual Technical Symposium, 1989, San Diego, United States

Abstract

Electroluminescent lamps can be used as a convenient stable source of luminescence over at least a three thousand-fold range of light intensity. The electroluminescence (EL) output increases with increasing applied voltage. Using a Quantex 3 x 3 inch EL lamp with a green-emitting phosphor, we found that as little as 10 VAC can be used to elicit EL and that the EL emission spectrum remained constant over a wide range of applied voltages (λ re- 508 nm; FWHM = 75 nm). Resolution measurements can be made under conditions of high or low light intensities by placing a resolution target over the EL lamp and manipulating the voltage, or by using a neutral density filter to achieve the desired light intensity, or by combining both procedures to achieve the desired light intensity and image content. The absolute EL flux, per unit area of the lamp, can be determined using the ferrioxalate chemical actinometer, corrected for light transmission and the corrected emission spectrum of the lamp. The EL lamp can thus also be used as a tertiary radiometric standard for quantification, as well as for resolution testing.

Citation Download Citation

Dennis J. O'Kane and John E. Wampler "A Variable Intensity Electroluminescence Standard For Video Microscopy", Proc. SPIE 1161, New Methods in Microscopy and Low Light Imaging, (22 December 1989); https://doi.org/10.1117/12.962700

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