Semiconductor sensor
AssigneeOSRAM Opto Semiconductors GmbH
InventorsDaniel Dietze, Tim Boescke, Wolfgang Zinkl
Life of this patent
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Abstract
A semiconductor sensor includes a detector chip that detects green light and an interference filter that optically precedes the detector chip and is permeable to green light and impermeable and reflective to red light and near-infrared radiation. A color filter optically precedes the interference filter. The color filter has a transparency of at least 60% for green light and has an absorbing effect for red light and near-infrared radiation. The semiconductor sensor appears gray or black in the region of the interference filter independently of the angle.
Claims15
A semiconductor sensor comprising:
- a detector chip that detects radiation of a first wavelength range or green light,
- an interference filter that optically precedes the detector chip and is permeable to the radiation of the first wavelength range or the green light, and impermeable and reflective to radiation of a second wavelength range or red or near-infrared light,
- a color filter that optically precedes the interference filter,
- wherein
- the color filter has a transparency of at least 60% for the first wavelength range or green light, and absorbs radiation of the second wavelength range or red or near-infrared light, and
- the semiconductor sensor appears gray or black to an observer in a region of the interference filter independently of the angle,
- the interference filter comprises at least one refractive index matching layer that delimits the interference filter toward the color filter, and
- a cast body in which the interference filter and the detector chip are embedded,
- wherein the cast body contains least one plastic to which at least one filter material is added, and
- the cast body extends across the interference filter so that the color filter is formed by the part of the cast body extending across the interference filter.
Dependencies are inferred from the claim text.