Method for producing polarisation filters and use of polarisation-sensitive photo-sensors and polarisation-generating reproduction devices
OwnerGunter Grauinventor
Life of this patent
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Abstract
The present invention relates to methods for manufacturing polarization sensitive respectively polarizing filters and to their application to polarizing photosensors used to measure the polarization of incident light, further to designs of polarization sensors measuring angles of rotation and strong electric or magnetic fields as well as to reproducing polarization equipment reproducing polarized signals or to reproduce independent signals.
Claims24
A method for manufacturing an apparatus with a polarization sensitive filter of given size and orientation, wherein parallel, thin, elongated grating structures close to one another are produced using lithographic methods, thinner than the wavelength to be measured and with a spacing smaller than the wavelength to be measured, using a plurality of manufacturing planes or metallization planes, having defined the geometric structure and orientation already during the design of mask data, restricting to the feature sizes and manufacturing steps allowed for the design of integrated circuits, wherein the polarization sensitive filter includes at least one sensor element that is adapted to cooperate with a polarization sensor of which the plane of polarization is aligned at a predetermined angle relative to a fixed reference axis of the sensor element, and wherein the fixed reference axis is noticeable by a marking on a housing containing the polarization sensitive filter.
A method for manufacturing an apparatus with a polarization-sensitive filter of given size and orientation, wherein a polarized substance of predetermined direction of polarization is deposited on a lacquer-coated substrate at a given angle to this substrate, being acted on by at least one of a physical and chemical factor, specific substrate zones being rid of the lacquer by illumination and etching, and where, following at least one of hardening and cooling of the polarized substance on the substrate, at least one of the excess polarized material and lacquer of the remaining covered zones is further removed by at least one of etching and polishing, wherein the polarization sensitive filter includes at least one sensor element that is adapted to cooperate with a polarization sensor of which the plane of polarization is aligned at a predetermined angle relative to a fixed reference axis of the sensor element, and wherein the fixed reference axis is noticeable by a marking on a housing containing the polarization sensitive filter.
An apparatus measuring the polarization of light and comprising at least one sensor element, wherein the sensor element is configured as a unit of a polarization filter cooperating with a polarization sensor of which the plane of polarization is aligned at a predetermined angle relative to a fixed reference axis of the sensor element, and the reference axis being noticeable by a marking on a housing of the apparatus.
An apparatus for measuring an angle of polarized light, with a light source, a rotatable polarization filter and a reflecting medium, wherein the light source, the rotatable polarization filter and the reflecting medium are configured relative to each other in a manner that light emitted from the light source is reflected at the reflecting medium, passed through the rotatable polarization filter and detected by at least one polarization sensor of the apparatus, wherein the polarization sensitive filter includes at least one sensor element that is adapted to cooperate with the polarization sensor of which the plane of polarization is aligned at a predetermined angle relative to a fixed reference axis of the sensor element, and wherein the fixed reference axis is noticeable by a marking on a housing containing the polarization sensitive filter.
An apparatus to drive an actuator, with a light source, a rotatable polarization filter, a reflecting medium and a reference value input, wherein said light source, said rotatable polarization filter and said reflecting medium are configured relative to each other in a manner that light from the light source can be reflected at the reflecting medium, pass through the rotatable polarization filter and be detected by at least one polarization sensor, wherein the at least one polarization sensor is configured with apparatus driving an actuator and cooperating with it to compare the measured signal to a reference value, wherein the polarization sensitive filter includes at least one sensor element that is adapted to cooperate with the polarization sensor of which the plane of polarization is aligned at a predetermined angle relative to a fixed reference axis of the sensor element, and wherein the fixed reference axis is noticeable by a marking on a housing containing the polarization sensitive filter.
Dependencies are inferred from the claim text.