Fiber-optic elements

FOE-0 and FOE-180 (twister) are used in electron-optical systems for image intensifier, generation 2+.

Technical specifications

Fiber size, mkm	6
Calculated numerical aperture	1,0
Diameter of light zone, mm	18
Thickness, mm	16-26
Maximum angle deviation of image rotation	± 1°
Flatness of effective areas	Up to N =5 ∆N =1
Coefficient of the contrast transfer at the spatial frequency 5,0 lin/mm 12,5 lin/mm 25,0 lin/mm	0,98 0,96 0,85
Temperature coefficient of linear expansion at temperature range from 20° С to 300° С	(73±3) х 10^-7° С^-1
Spectral transmittance in diffuse light at 550 nm wavelength with 5 mm diameter in central zone	45 %
Extra-Mural Absorption (ЕМА)	coaxial