Infrared afocal refractor telescope

Details Infrared afocal refractor telescope Infrared afocal refractor telescope

1985-05-07

1987-04-21

Arnold, Bruce Y.

350560, G02B 1516, G02B 102

Patent

active

046591710

ABSTRACT:
An infrared afocal refractor telescope (40) comprises a zoom system (27), a collecting system (28) and an eyepiece system (30) arranged in a common optical axis (26). The zoom system (27) is formed by a fixed objective lens component (K) and by a first lens component (H) mounted on a carriage (32) and by a second lens component (I,J) mounted on a carriage (31), the carriages (32,31) being separately movable along the optical axis (26). The movable lens components of the zoom system (27) each have the same sign of optical power and the variation in telescope magnification provided by selective positioning of the carriages (32,31) is at least 5:1 in range. The locus (34,33) of movement of each of the two movable lens components (H;I,J) renders the telescope athermalized.

REFERENCES:
patent: 3947084 (1976-03-01), Noyes
patent: 4411488 (1983-10-01), Neil
patent: 4486069 (1984-12-01), Neil et al.

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