Fiber optic elements FOE-0 FOE-180 (converters) are applied in the electron-optical systems for devices of various purposes.

Specifications:

Material	optical glass TBF 10/WО 50/WТО 2314
Fiber size, mkm	6
Calculated numerical aperture	1,0
Diameter of light zone, mm	18
Thickness, mm	20
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	0,98
12,5 lin/mm	0,96
25,0 lin/mm	0,85
Temperature coefficient of linear expansion at temperature range from 20° С до 300° С	(73±3)*10-7° С-1
Spectral transmittance in diffuse light at 550nm wavelength with 5mm diameter in central zone	45 %