04525067 is referenced by 16 patents and cites 3 patents.

A twin-etalon scanning spectrometer is disclosed that provides high luminosity and high resolution. The etalons are positioned in spaced relationship with respect to one another in series in the path of an emission light source. With identical etalons so positioned, a line emission transmitted by the rearwardly positioned etalon is at the same angles as that of the forwardly positioned etalon and the light transmission through the etalons is therefore at a maximum. When the relative spacing of the light transmission elements of one etalon is changed, however, the angles of transmission of the etalons are mismatched and the transmission of the light through the etalons is decreased until a minimum is reached when a .lambda./4 change in light transmission element spacing of one etalon relative to the other etalon has been effected. By varying the spacing between maximum and minimum, modulation of the incoming light is effected, which modulated radiation is then collected by a detector with the resulting electrical signals then being processed for display.

Title
Twin-etalon scanning spectrometer
Application Number
6/436124
Publication Number
4525067
Application Date
October 22, 1982
Publication Date
June 25, 1985
Inventor
Gonzalo J Hernandez
Boulder
CO, US
Agent
Robert E Harris
Alvin J Englert
Eugene J Pawlikowski
Assignee
The United States of America represented by the Secretary of Commerce
DC, US
IPC
G01B 9/02
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