Reflection grating optical odometer专利检索-运动探测器传感器与探测器专利检索查询-专利查询网

Reflection grating optical odometer

阅读：323发布：2023-06-28

专利汇可以提供Reflection grating optical odometer专利检索，专利查询，专利分析的服务。并且An optical system for measuring relative displacement or velocity relative to a surface has grating and light directing means to receive incident light from the surface and direct the light in two different directions to photodetectors which respectively produce signals proportional to the intensity of the light received. The signals from the photodetectors are applied to a differential amplifier which produces an output signal representing the difference between the photodetector signals and which thus has a frequency representing the speed or movement of the system relative to the surface. This output signal may then be applied to known frequency counting devices for indicating velocity or distance travelled from a zero position.，下面是Reflection grating optical odometer专利的具体信息内容。

权利要求

1. Apparatus for measuring displacement or velocity relative to a surface above which said apparatus is independently supported for travel relative to the surface said apparatus comprising grating and light directing means having several pairs of light reflecting means with the light reflecting means of the several pairs being arranged in alternation and with the light reflecting means in each pair being adapted to reflect incident light received from the surface in two different general directions, respectively, thereby to provide separate light signals representative of luminous intensity variations of the surface relative to which the apparatus travels, and means effective to compare said separate light signals and provide an output signal derived from the difference therebetween.

2. Apparatus according to claim 1 wherein the grating and light directing means comprise a first series of spaced concave reflective bands having a common centre of curvature, and a second series of spaced concave reflective bands interposed between and in alternation with the bands of the first series and having a common centre of curvature spaced from the centre of curvature of the first series.

3. Apparatus according to claim 1 wherein the grating and light directing means comprise a grating having reflective and transmissive bands arranged in alternation backed by a mirror, the grating and the mirror being relatively inclined so that light reflected by the reflective bands of the grating is directed in a first general direction and light transmitted through the transmissive bands of the grating is reflected by the mirror backing the grating to be directed in a second general direction.

4. Apparatus according to claim 3 wherein the grating and the mirror are so disposed that light transmitted through the transmissive bands of the grating is reflected by the mirror back through the transmissive bands of the grating.

5. Apparatus according to claim 3 comprising a lens disposed in front of the grating to focus or collect light directed in said two general directions on to respective photodetector means.

6. Apparatus according to claim 3 comprising means providing an aperture through which light from said surface passes to said grating and light directing means, and an objective lens to focus or collect light received from the surface onto the aperture.

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Reflection grating optical odometer

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