WebOhara Group is an international group of companies with headquarters in Japan and subsidiaries in Japan (Ohara, Inc.), United States (Ohara Corporation), and Germany (Ohara, GmbH). Ohara manufactures optical and electronic products and also offers measurement services, in particular measurement of refractive indices of solids and liquids. WebPoisson's Ratio σ 0.227 1800 0.985 Knoop Hardness Hk[Class] Abrasion Aa 117 Photoelastic Constant β nm/(cm・105Pa) (-30~+70℃) Mechanical Properties Phosphate Resistance PR 900 0.999 1000 0.998 1200 0.998 Acid Resistance(Surface) Group SR Thermal Properties 800 0.999 Weathering Resistance(Surface) Group W(S) B3 …
Ohara Corporation Technical Data Sheets - MatWeb
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KR20150133139A - Wynne-dyson projection lens with reduced
WebApr 30, 2015 · オハラからS-FPL55が登場. 双眼鏡や天体望遠鏡、デジタル一眼レフカメラの交換レンズに詳しい方なら、EDガラスやSDガラスの名称は聞いたことがあるかと思います。. さらに、その硝材が、オハラ製なら、S-FPL51、S-FPL53というのもご存知の方が多いのではない ... Weband S-FPL51Y the highest, so these are a logical starting point: n d 1 n d { , n FC where , , and are the refractive indices at 486.1, 587.6,nn n Fd C and 656.3 nm, respectively. Unfortunately, S-FPL51Y has an anomalously high thermal expansion, nearly 60% higher than the typical i-line glass. S-FSL5Y has the second-highest Abbe WebThe glass types used for the lens elements are selected from the group of optical glasses consisting of: fused silica, S-FPL51Y, S-FSL5Y, BSM51Y and BAL15Y. A Wynne-Dyson projection lens for use in an ultraviolet optical lithography system is disclosed, wherein the projection lens is configured to have reduced susceptibility to damage from ... hormone effect on liver