Temperature control of the bandpass of an interference filter.
This paper describes a narrow bandpass filter which is temperature controlled to maintain optical characteristic while operating in an ambient temperature range of -20 degrees C to +70 degrees C. Pertinent source of bandpass shift and means for their control are discussed. The analytical approach, resultant filter assembly configuration, and performance test results of the assembly are presented.
Mark
R
R
Morand
D
D
Waldstein
S
S