ITY-430 “High pressure mercury lamp” and “Metal halide lamp”, which is using for the image quality change up to high fineness and high brightness, emanate not only visible light but also strong ultraviolet light and a part of harmful visible light. Those lights produce injurious effects for human body and it also can be cause of deterioration of the optical components. Our ITY430, the 50 percentile is 430nm, (more shift to IR side than old technique). This ITY430 filter absorbs those strong ultraviolet lights and a part of harmful visible light. Even if compared with other interference filter, there is a lot of advantage as follows,

SUPER IR CUT FILTER

Comparison of"ITY430" and "Interference filter"

Description Property	ITY430(t=1.1mm)		Interference filter
	Performance	Determination	Performance	Determination
50 percentile property	4302nm		4305nm
Starting property	very steep		steep
Rate of dependence of A.O.I.	small		big
Light blocking effect for UV light	high absorption		Reflection
Transmittance of visible light
Influence for blue	small		big
Influence for pinhole.	no		some possibility

Explanation of a sign			excels very much			excels
			a little inferior.			inferior.

SUPER IR CUT FILTER

Isuzu Glass created the filter with unique optical characteristic that was not available before. This has been achieved by applying coatings on our original filter glass. This filter transmits maximum amount of visible rays and sharply cuts infrared rays.

SUPER IR CUT FILTER

R&D

Develop and maintain high performance lenses by using originally designed measuring instrument. Our facility is well equipped with various instruments for the measuring of optical components, such as, an originally designed optical axis measuring instrument, an interferometer, a spherometer, a spectrophotometer and a 3-D measuring machine. We have established customers confidence by developing and maintaining high performance products using these instruments.