[특허]Narrowband optical filter with partitioned cavity

Narrowband optical filter with partitioned cavity 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G02B-005/28
출원번호	US-0058495 (1987-06-05)
발명자 / 주소	Southwell William H. (Thousand Oaks CA) Gunning William J. (Newbury Park CA)
출원인 / 주소	Rockwell International Corporation (El Segundo CA 02)
인용정보	피인용 횟수 : 47 인용 특허 : 0

초록 ▼

A method of designing a thin film optical bandpass filter, for transmitting light in a narrow band of wavelengths centered about a bandpass wavelength, begins by defining a first quarter-wave stack, including a first plurality of layers each having an optical thickness equal to one fourth the bandpass wavelength. A second quarter-wave stack includes a second plurality of layers each having an optical thickness equal to one fourth the bandpass wavelength. Next, a cavity layer is defined with an optical thickness equal to an integral multiple of one half the bandpass wavelength, to be interposed between the first quarter-wave stack and the second quarter-wave stack. The cavity layer is then replaced with a partitioned cavity, including at least one layer of a first optical material with a relatively high index of rfraction and at least one layer of a second optical material with a relatively low index of refraction. The partitioned cavity layers, which initially have a total optical thickness equivalent to the optical thickness of the cavity layer, are adjusted in physical thickness to center the transmission peak of the filter on the bandpass wavelength. Thin film optical bandpass filters produced according to the method are also disclosed.

대표청구항 ▼

A method of designing a thin film optical bandpass filter for transmitting light in a narrow band of wavelengths centered about a bandpass wavelength, comprising the steps of: defining a first quarter-wave stack, including a first plurality of layers each having an optical thickness equal to one fourth the bandpass wavelength; defining a second quarter-wave stack, including a second plurality of layers each having an optical thickness equal to one fourth the bandpass wavelength; defining a cavity layer, having an optical thickness equal to an integral multiple of one half the bandpass wavelength, to be interposed between the first quarter-wave stack and the second quarter-wave stack; replacing the cavity layer with a partitioned cavity, including at least one layer of a first optical material with a relatively high index of refraction and at least one layer of a second optical material with a relatively low index of refraction, the partitioned cavity layers having a total optical thickness equivalent to the optical thickness of the cavity layer; and adjusting the physical thickness of each partitioned cavity layer to center the transmission peak of the filter on the bandpass wavelength.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Narrowband optical filter with partitioned cavity 원문보기

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Narrowband optical filter with partitioned cavity 원문보기

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이 특허를 인용한 특허 (47)

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