OHARA INC. : S-LAH55V, S-LAH65V

S-LAH55V, S-LAH65V

S-LAH55 and S-LAH65 have been used generally as optical materials for replacement lenses of digital cameras and single-lens reflex cameras.
The composition of these glass materials has been optimized to reduce costs, while maintaining optical and processing properties.
We recommend these materials as new S-LAH55V and S-LAH65V.

			S-LAH55V	S-LAH55	S-LAH65V	S-LAH65
Optical properties	Refractive Index n_d		1.83481	1.83481	1.80400	1.80400
	Abbe Number ν_d		42.7 42.73	42.7 42.71	46.6 46.58	46.6 46.57
	Coloring	λ80	400	400	385	385
	Coloring	λ5	325	320	315	315
Thermal Properties	CTE α (10^-7/°C)	-30～70°C	62	62	60	60
	CTE α (10^-7/°C)	+100～300°C	77	76	74	73
	Transformation Point Tg(°C)		695	684	691	700
	Yield Point At(°C)		718	711	711	723
Mechanical Properties	Specific Gravity		4.73	4.73	4.72	4.76
	Knoop Hardness Hk		740[7]	750[7]	730[7]	730[7]
	Abrasion Aa		59	59	55	56
Chemical Properties	Water Resistance RW(p) (Powder Method)		1	1	1	1
	Acid Resistance RA(p) (Powder Method)		3	3	3	3
	Weathering Resistance W(s) (Surface Method)		4	1	3	1-2
	Acid Resistance SR		4.0	4.0	4.1	4.1
	Phosphate Resistance PR		1.0	1.0	1.0	1.0
Detail Catalog DATA			PDF	PDF	PDF	PDF