Radiation sensor
First Claim
1. A radiation sensor comprising:
- first and second pixels;
a radiation absorption filter positioned over the first pixel but not the second pixel, wherein a combined spectral response of the radiation absorption filter and the first pixel has a first pixel pass-band and a first pixel stop-band; and
an interference filter positioned over the first and second pixels, wherein a spectral response of the interference filter has an interference filter pass-band which is substantially within the first pixel pass-band for radiation incident on the interference filter at a first angle of incidence, and substantially within the first pixel stop-band for radiation incident on the interference filter at a second angle of incidence greater than the first angle of incidence.
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Accused Products
Abstract
A radiation sensor includes first and second pixels with a radiation absorption filter positioned over the first pixel and an interference filter positioned over both the first and second pixels. The combined spectral response of the absorption filter and the first pixel has a first pixel pass-band and a first pixel stop-band. The spectral response of the interference filter has an interference filter pass-band which is substantially within the first pixel pass-band for radiation incident on the interference filter at a first angle of incidence, and substantially within the first pixel stop-band for radiation incident on the interference filter at a second angle of incidence greater than the first angle of incidence.
25 Citations
34 Claims
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1. A radiation sensor comprising:
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first and second pixels; a radiation absorption filter positioned over the first pixel but not the second pixel, wherein a combined spectral response of the radiation absorption filter and the first pixel has a first pixel pass-band and a first pixel stop-band; and an interference filter positioned over the first and second pixels, wherein a spectral response of the interference filter has an interference filter pass-band which is substantially within the first pixel pass-band for radiation incident on the interference filter at a first angle of incidence, and substantially within the first pixel stop-band for radiation incident on the interference filter at a second angle of incidence greater than the first angle of incidence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A combined proximity and ambient light sensor comprising:
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first and second pixels; a radiation absorption filter positioned over the first pixel but not the second pixel, wherein a combined spectral response of the radiation absorption filter and the first pixel has a first pixel pass-band and a first pixel stop-band; and an interference filter positioned over the first and second pixels, wherein a spectral response of the interference filter has an interference filter pass-band which is substantially within the first pixel pass-band for radiation incident on the interference filter at a first angle of incidence, and substantially within the first pixel stop-band for radiation incident on the interference filter at a second angle of incidence greater than the first angle of incidence. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A method of manufacturing a radiation sensor including first and second pixels, the method comprising:
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positioning a radiation absorption filter over the first pixel; and positioning an interference filter over the first and second pixels, wherein a combined spectral response of the radiation absorption filter and the first pixel has a first pixel pass-band and a first pixel stop-band and wherein positioning the interference filter comprises providing the interference filter with an interference filter pass-band which is substantially within the first pixel pass-band for radiation incident on the interference filter at a first angle of incidence, and substantially within the first pixel stop-band for radiation incident on the interference filter at a second angle of incidence greater than the first angle of incidence. - View Dependent Claims (30, 31, 32, 33, 34)
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Specification