Accession Number:

ADA151390

Title:

Transmission Coefficient Measurements of UV Window/Filter/Lens System for Vinton Camera.

Descriptive Note:

Technical note,

Corporate Author:

DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s):

• Khanna,S. M.
• Apps,R. G.

Report Date:

1983-09-01

Pagination or Media Count:

17.0

Abstract:

The UV transmission coefficients of various optical components of the CF Vinton camera system were measured in the laboratory over 320-950 nm wavelength region. The suitability of these components for use in UV aerial surveillance work was assessed. In summary, the present system consisting of the window, UV filter and UV lens form a reasonably good system for use in UV aerial surveillance. In particular, the system is totally blocked above about 390 nm. However, it has relatively limited peak transmission and the passband does not extend to still shorter UV wavelengths which are transmitted through the atmosphere. The transmittance of the system could be increased and extended to shorter UV wavelengths by improving the UV transmission characteristics of the lens or and window. As discussed above, the filterlens combination has higher transmittance than the windowfilterlens combination and should be used whenever it is feasible.

Descriptors:

• *ULTRAVIOLET FILTERS
• CANADA
• TRANSMITTANCE
• AERIAL CAMERAS
• CAMERA LENSES
• ULTRAVIOLET PHOTOGRAPHY

Subject Categories:

• Cartography and Aerial Photography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE