DOD A-A-51318-1985 MEASURE LENS OPHTHALMIC《眼科镜量度器》.pdf
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1、A-A-51318 65 M 9999974 0026813 O m ! /=-/Y377 c f A-A-5131 18 December 1985 COMMERCIAL ITEM DESCRI PTION MEASURE, LENS, OPHTHALMIC The General Services Administration has authorized the use of this commercial item description. This comercial item description covers a hand-held lens measuririy clock
2、of Geneva Improved type use for determininy the dioptric powers of an ophthalmic lens uy measuring the surface curvatures. Sal ient character i st ics: The clock shall be palm size approximately two inches in diameter. The dial shall be graduated in 0.25 diopter steps up to plus and minus 1.7.00 dio
3、pters. shall be within i- 0.1 diopter from zero to full scale. shall be differentiated by black and red color with white face. The crystal shall be made of clear plastic or glass material. The edge of the clock shall have three protruding blunt steel pojnts with the two outer points fixed and the ce
4、nter point movable. either lass or CR-39 lens surface without scratching. Accurac The plus and minus dials i The points shall be usable on A plastic cover shall1 be snug fi 9. ted to the points area to protect the points when riot in use. The metai case shall be made of poiished corrosion-resistan%
5、rnetal Each instrument shall be legibly and permanently marked with the name or traaernark of the manufacturer. Workmanship. The instrument shall be free from defects which detract from its appearance or impair its servi ceab i 1 i ty . Unit. Each (EA). One lens clock, as specified, constitutes one
6、unit. Contractor certification. The contractor shall certify that the product offered meets the sal ient characteristics of this description ana coiifomis to the prodLrcer.i own drawings, specifications, standards, and quality assurance practices. The Government reserves the right to require proof o
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