Abstract:We present a cryogenic configurable slit unit (CSU) for a multi-object infrared spectrograph with an effective field of view of [Formula: see text] that was completely conceived and designed in the laboratory at TIFR. Several components of the CSU including the controller for the commercially procured piezo-walkers, controlled loop position sensing mechanism using digital slide calipers and a cryogenic test facility for the assembled prototype were also developed in-house. The principle of the CSU involves div… Show more
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