Light source device for endoscope which shields lamp noise

Details Light source device for endoscope which shields lamp noise Light source device for endoscope which shields lamp noise

1997-06-03

1999-07-20

Sember, Thomas M.

Illumination

Housing

With cooling means

362155, 362264, 362294, 362580, F21V 2900

Patent

active

059247916

ABSTRACT:
A light source device for an endoscope which sufficiently shields the high-frequency noise produced from a lamp even if there is an opening through which the lamp is exchanged. A lamp hatch for shielding the noise is provided at the opening of the lamp house, and EMI springs for maintaining the electrical conduction state are provided at the portion at which the lamp hatch and the edge portion of the opening overlap each other. When a cooling fan is provided in the lamp house, a plurality of air ports are provided in the lamp hatch which make the air flow of the cooling fan smooth and which have an effect of shielding the noise produced from the lamp. It is favorable to arrange the air ports at an interval of less than 2/.lambda. on the assumption that the wavelength of the noise frequency is .lambda..

REFERENCES:
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patent: 3457454 (1969-07-01), Boland
patent: 4234910 (1980-11-01), Price
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patent: 4922385 (1990-05-01), Awai
patent: 4933816 (1990-06-01), Hug et al.
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patent: 5111367 (1992-05-01), Churchill
patent: 5479322 (1995-12-01), Kacheria
patent: 5497573 (1996-03-01), Stadjuhar et al.
patent: 5526249 (1996-06-01), Karasawa

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