FIELD: cryogenic equipment, may be used in optics for dispensing, storing and packing of products at low temperature. SUBSTANCE: apparatus has housing with upper surface formed as at least one Fresnel lens, which is arranged so that mirror screen may be provided above face side of this lens. EFFECT: increased efficiency and enhanced reliability in operation. 13 cl, 3 dwg
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Authors
Dates
1999-01-10—Published
1996-11-01—Filed