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NEAR ULTRAVIOLET RAY AND INFRARED RAY BLOCKING FILTER, BIREFRINGENT PLATE WITH NEAR ULTRAVIOLET RAY AND INFRARED RAY BLOCKING FILTER, OPTICAL LOW PASS FILTER AND IMAGING APPARATUS
NEAR ULTRAVIOLET RAY AND INFRARED RAY BLOCKING FILTER, BIREFRINGENT PLATE WITH NEAR ULTRAVIOLET RAY AND INFRARED RAY BLOCKING FILTER, OPTICAL LOW PASS FILTER AND IMAGING APPARATUS
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机译:近紫外射线和红外线阻挡滤光片,近紫外射线和红外线阻挡滤光片双折射板,光学低通滤光片和成像装置
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摘要
PROBLEM TO BE SOLVED: To provide a near ultraviolet ray and infrared ray blocking filter which can block both near ultraviolet ray and infrared ray.;SOLUTION: The near ultraviolet ray and infrared ray blocking filter comprises a substrate 2 made of a light translucent member, a 1st multilayered film 2a made by alternatively laminating a high refractive index film for preventing infrared rays and a low refractive index film on one main surface of the substrate 2 and a 2nd multilayered film 2b made by alternatively laminating a high refractive index film for preventing near ultraviolet rays and the low refractive index film on another main surface of the substrate 2. The number of total layers in the 1st multilayered film 2a is 20 or more and the number of total layers in the 2nd multilayered film 2b is 19 or more.;COPYRIGHT: (C)2008,JPO&INPIT
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