Geometrical beam splitter and a sensor for multi-element detectors
First Claim
1. A geometrical beam splitter for transversally dividing a radiation beam into at least one reflected beam portion and at least one passing beam portion, said beam splitter:
- being composed of a piece of rigid material having a non-transparent reflective surface at an angle in respect to the incident direction of said radiation beam, said angle substantially deviating from the right angle; and
having a width and a height extending over a total effective cross-sectional area of the radiation beam, and at least two holes extending through said piece of rigid material, wherein said holes have at least a length that is equal with the diameter of the holes and reflective walls to form radiation guiding wavetubes, whereupon;
said holes allow passing of at least two beam portions with radiation from a substantially same object area or volume into separate and independent targets; and
simultaneously said non-transparent reflective surface divert at least one reflected beam portion with radiation from said substantially same object area or volume into one or more separate and independent target(s), said beam portions having substantially similar wavelength distributions.
1 Assignment
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Accused Products
Abstract
The invention relates to a geometrical beam splitter, e.g. in a sensor, for transversally dividing a radiation beam (4) into at least one reflected beam portion (5R) and at least one passing beam portion (5T). The beam splitter (1) is composed of a piece (11) of rigid material having a non-transparent reflective surface (3) at an angle (α) deviating from the right angle in respect to the incident direction (RI) of said radiation beam. The beam splitter has a width (W) and a height (H) extending over a total effective cross-sectional area (A*) of the radiation beam (4) and e.g. two holes (2a, 2b) extending through said piece of rigid material. The holes allow passing of at least two beam portions (5T), and simultaneously the non-transparent reflective surface divert at least one reflected beam portion (5R) so that said beam portions have substantially similar wavelength distributions.
15 Citations
36 Claims
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1. A geometrical beam splitter for transversally dividing a radiation beam into at least one reflected beam portion and at least one passing beam portion, said beam splitter:
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being composed of a piece of rigid material having a non-transparent reflective surface at an angle in respect to the incident direction of said radiation beam, said angle substantially deviating from the right angle; and
having a width and a height extending over a total effective cross-sectional area of the radiation beam, and at least two holes extending through said piece of rigid material, wherein said holes have at least a length that is equal with the diameter of the holes and reflective walls to form radiation guiding wavetubes, whereupon;
said holes allow passing of at least two beam portions with radiation from a substantially same object area or volume into separate and independent targets; and
simultaneously said non-transparent reflective surface divert at least one reflected beam portion with radiation from said substantially same object area or volume into one or more separate and independent target(s), said beam portions having substantially similar wavelength distributions.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A sensor comprising:
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a radiation source;
a measuring chamber, and a geometrical beam splitter composed of a piece of rigid material, with at least one hole extending through said piece of rigid material, said hole passing a transversal beam portion into at least a first detector, a non-transparent reflective surface on said piece of rigid material reflecting at least two transversal beam portions into at least a second and a third detector, and a width and a height extending over a total effective cross-sectional area of the radiation beam necessitated by the detectors;
whereupon a radiation beam from said radiation source travels to said at least three detectors through the measuring chamber, said beam splitter positioned between the detectors and the measuring chamber so as to allow a reflected portion and an undiverted portion of said radiation beam to reach the detectors simultaneously, wherein in said beam splitter;
said at least one hole has/have length(s) at least equal with the diameter of the holes forming wavetube(s) for the transversal beam portion(s) passing through the hole(s); and
said non-transparent reflective surface has such continuous surface dimensions around said at least one hole, and said hole(s) has/have such diameter(s), which allow reflectance and respectively passing of said beam portions with substantially similar wavelength distributions, concentrating the sensitivies of the detectors to receive radiation substantially from a common area or volume of the measuring chamber. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification