Veiling glare measurements in the F4111 image intensifier

Mukund Acharya; Robert M. Bunch; Richard J. Hertel

doi:10.1117/12.151284

1 December 1993 Veiling glare measurements in the F4111 image intensifier

Mukund Acharya, Robert M. Bunch, Richard J. Hertel

Author Affiliations +

Optical Engineering, Vol. 32, Issue 12, (December 1993). https://doi.org/10.1117/12.151284

Abstract

Veiling glare is a phenomenon present in most imaging devices and systems. It is a source of concern in proximity-focused image intensifiers where it causes a loss in image contrast, especially at low spatial frequencies. Veiling glare was measured in two different ITT F4111 18-mm image intensifiers, one with a fiber optic input window and fiber optic output window (FO/FO), and the other with a quartz input and fiber optic output window (Q/FO), by means of a half-field high-contrast excitation method. Near-field veiling glare, a measure of stray light close to a high-contrast edge, and far-field veiling glare, a measure of more widely distributed stray light, were measured as fractions of the illumination level. Near-field veiling glare of 0.4±0.1 and far-field veiling glare of 0.08±0.02 were measured for the FO/FO intensifier, and near-field veiling glare of 0.38±0.01 and far-field veiling glare of 0.03±0.002 were measured for the Q/FO intensifier. The characteristic length, which is a measure of the extent of veiling glare from the edge, was 0.69±0.04 mm (near-field) and 1.8±0.4 mm (far-field) for the FO/FO intensifier, and 1.19±0.03 mm (near-field) and 6±1 mm (far-field) for the Q/FO intensifier. A preliminary investigation suggests that the characteristic length for near-field glare increases with increasing wavelength.

Citation Download Citation

Mukund Acharya, Robert M. Bunch, and Richard J. Hertel "Veiling glare measurements in the F4111 image intensifier," Optical Engineering 32(12), (1 December 1993). https://doi.org/10.1117/12.151284

Published: 1 December 1993

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

Members: $24.00

Non-members: $28.00 ADD TO CART

JOURNAL ARTICLE
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Image intensifiers

Near field

Microchannel plates

Fiber optics

Quartz

Fiber optics tests

Light scattering

Show All Keywords

Keywords/Phrases

Search In:

Publication Years