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- W2029353059 abstract "continuously changed by moving element 2 and 3 axially.Element 5 is a rear element called collimating lens,passing itthe light is parallel on the exit pupil.With the temperature change the dn/dt of germanium has an in—neglectful effection on the image quility as we have known. Inthis optical system the focal point behind element 4 is variblebecause of the temperature change, and the collimating lens hasto move axially to ensure that the distance from the focal pointto the collimating lens keeps constant. The movement of thecollimating lens must accurately correspond with the temperaturevariation. According to the tracing calculation, the whole move—ment amount of the collimating lens for compensating focal pointshift is 0.707 mm. The compensation process has to be high sen-sitivity and high accuracy. A step motor controlled by a micro-" @default.
- W2029353059 created "2016-06-24" @default.
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- W2029353059 date "1995-10-05" @default.
- W2029353059 modified "2023-10-16" @default.
- W2029353059 title "Athermalization design in the big-aperture IR zoom telescope" @default.
- W2029353059 doi "https://doi.org/10.1117/12.222826" @default.
- W2029353059 hasPublicationYear "1995" @default.
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