Photodetector having an electrically conductive, selectively transmissive window
First Claim
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1. A photodetector device having substantially decreased sensitivity to various electromagnetic interferences, the device comprising:
- an electrically conductive case having a hollow interior portion;
a photosensitive material positioned within the case;
an opening defined in a portion of the case; and
an electrically conductive window structure transparent to selected wavelengths of energy positioned within the opening to enclose the interior of the case, the electrically conductive window being in electrical contact with the electrically conductive case;
whereby the window may pass radiation of selected wavelengths while isolating the photosensitive material from interference energy of non-selected wavelengths.
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Abstract
A photodetector including a photosensitive material which changes its electrical properties in response to radiation striking the material, and particularly radiation of a wavelength at or near that of light, positioned within an electrically conductive enclosure and having a window transparent to the desired light and near light wavelengths positioned in an opening in such enclosure, the window being electrically conductive to protect the light sensitive material from various electromagnetic, radio frequency and similar interference.
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Citations
12 Claims
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1. A photodetector device having substantially decreased sensitivity to various electromagnetic interferences, the device comprising:
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an electrically conductive case having a hollow interior portion; a photosensitive material positioned within the case; an opening defined in a portion of the case; and an electrically conductive window structure transparent to selected wavelengths of energy positioned within the opening to enclose the interior of the case, the electrically conductive window being in electrical contact with the electrically conductive case; whereby the window may pass radiation of selected wavelengths while isolating the photosensitive material from interference energy of non-selected wavelengths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A photodiode device insensitive to interference radiation, the photodiode comprising:
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a metallic, electrically conductive case defining an internal void therein; a photosensitive diode material supported within the metallic case adjacent one wall thereof; an opening defined in the metallic case at a position opposite that at which the photodiode material is positioned; and a window structure transparent to light and near light wavelength radiation, the window structure being electrically conductive and positioned within the case opening to establish electrical contact with the metallic case; whereby the photosensitive diode material is isolated from interference radiation by the surrounding electrically conductive window structure and metallic case. - View Dependent Claims (11, 12)
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Specification