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first page  ::  Optical components and technologies  ::  Infrared objectives  ::  Infrared variable-focal-length objectives

With smooth focal-length variation

Item

Focal length, mm

Focal number

Field of view, deg.

Operating spectral
range, mm

Weight, kg

No.
1 75-300 2 7,3/1,8 3÷5 11
2 60-360 2 11,8/2,0 8÷13 11,7
3 50-500 1,8 9,3/1,1 3÷5 44,5
4 55-500 3,1 10,0/1,1 3÷5 16,2
5 100-500 2 7,2/1,4 8÷13 43

Transmission in the operating spectral range, %                               80¸90

Concentration of energy in the circle of 30 mm in diameter in the range of 3-5 mm
 and that of 50
mm in diameter in the range 8-13 mm, %                                        80¸90

 

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