Accession Number:

AD0648425

Title:

INFRARED COATING STUDIES.

Descriptive Note:

Quarterly rept. no. 2, 16 Sep-15 Dec 66,

Corporate Author:

BAUSCH AND LOMB INC ROCHESTER N Y RESEARCH AND DEVELOPMENT DIV

Personal Author(s):

• Maier,R. L.

Report Date:

1966-12-15

Pagination or Media Count:

16.0

Abstract:

In line with the contract objective of coating studies in the far infrared, the work was concerned with transmission filters for the 20 micron to 50 micron region. In particular, three types of transmission filters employing LiF films are discussed. Bandpass and low frequency pass filters were designed for the long wavelength side of the LiF rst. band. Within the rst. band, where the ratio kn is high, induced transmission filters were designed, using LiF rst. layers to simulate metal films. Computed transmittance curves for these three types are given. It develops that LiF is not a particularly good material to use in the design of these transmission filters.

Descriptors:

• *INFRARED FILTERS
• *OPTICAL COATINGS
• *INFRARED OPTICAL MATERIALS
• OPTICAL COATINGS
• FILMS
• LITHIUM FLUORIDES
• WAVE PROPAGATION
• BANDPASS FILTERS
• OPTICAL PROPERTIES
• REFLECTIVITY

Subject Categories:

• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE