Optical graphic data tablet专利检索-计算机图形学电脑图像专利检索查询-专利查询网

Optical graphic data tablet

阅读：791发布：2022-10-10

专利汇可以提供Optical graphic data tablet专利检索，专利查询，专利分析的服务。并且An optical graphic data tablet operated with a light pen is provided for use as a computer input terminal. A light position sensing device detects the position of a light pen moved by the operator over a transparent plate and generates analog electrical output signals corresponding to the position of the light spot on the plate. The analog signals are converted to corresponding digital signals for use with a computer display terminal or the like. A digital position indicator is provided on the tablet cabinet for direct digital display of the stylus position so that the operator can verify the exact position before transmitting data to the computer.，下面是Optical graphic data tablet专利的具体信息内容。

权利要求

1. An optical graphic data tablet, comprising in combination a. an independently manually movable light source adapted to produce a light spot, b. a fixed and uniformly transparent stratum providing a working surface for said source, c. a fixed and continuously responsive solid state dual axis photo detector positioned in optical relation to said stratum and having a continuously variable analog output related to the absolute position of said light spot thereon said detector being a Schottky barrier photo diode, and, d. fixed continuously tRansparent optical means mounted in the optical path between said source and said detector for focusing said independently movable light spot at said surface onto said detector, e. said stratum, said optical means and said detector defining a continuously clear field of view over substantially the entire working surface.

2. An optical graphic data tablet according to claim 1 including digital display means in proximity to said stratum for displaying digital data with respect to the position of said spot on said stratum, and electronic converting means connected between said sensing means and said display means for converting the output of said sensing means into an input for said display means.

3. An optical graphic data tablet according to claim 1 including reflecting means disposed along the optical axis of said stratum and said sensing means for folding said axis.

4. An optical graphic data tablet according to claim 1 including a fresnel lens disposed in close parallel relation to said stratum between said stratum and said sensing means.

5. An optical graphic data tablet according to claim 1 wherein said stratum is a semi-reflective plate.

6. An optical graphic data tablet according to claim 1 in combination with an analog to digital converter connected to said photo-detector to provide digital signals corresponding to the position of said spot.

7. An optical graphic data tablet according to claim 1 in combination with a mask adapted to overlay said stratum, said mask bearing intelligent information and formed with a plurality of apertures related thereto.

8. An optical graphic data tablet according to claim 1 in combination with a computer.

9. An optical graphic data tablet according to claim 1 in combination with a computer output terminal and means for converting the output of said sensing means into signals adapted to operate said terminal.

10. An optical graphic data tablet according to claim 9 wherein said terminal is a typewriter.

11. An optical graphic data tablet according to claim 9 wherein said terminal is a cathode ray tube.

12. An optical tablet according to claim 1 wherein said sensing means includes a pair of gradient density filters in the image plane of said optical means and oriented perpendicularly to one another and light measuring means operatively associated with each filter for measuring the intensity of light passing therethrough.

13. An optical tablet according to claim 12 including third light measuring means for directly measuring light from said source passing through said stratum.

14. An optical tablet according to claim 1 including pulsing means for pulsing said light source and pulse measuring means connected to said sensing means for measuring pulsed light only.

15. An optical tablet according to claim 1 including a filter in the optical path of said sensing means for passing a relatively narrow band of light emitted by said source.

16. An optical tablet according to claim 1 including feedback means between said sensing means and said source for maintaining constant light intensity.

说明书全文

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Optical graphic data tablet

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