Optical type position detection device, hand device and touch panel

Abstract

The invention provides an optical type position detection device, a hand device and a touch panel. The optical type position detection device can accurately detect the sinking depth of an object when pressing into a light transmission member in an optical mode. In the optical type position detection device (10), a light source device (11) ejects a detection light (L2) from a second face (42) opposite to a first face (41) of the object (Ob) from the light transmission member, and a reflected light (L3) which is reflected by the object (Ob) and is transmitted to the second face (42) of the light transmission member is detected by means of a photodetector (30). The first face (41) of the light transmission part (40) has elasticity and adsorbability in relation to the object (Ob). In the position detection device (10), the sinking depth can be precisely detected at the instant moment when the object (Ob) contacts with the light transmission member (40) and when the object (Ob) presses the light transmission member (40).

Description

technical field [0001] The present invention relates to an optical position detection device for detecting the position of a target object located on one side of a light-transmitting member, and a hand device and a touch panel including the optical position detection device. Background technique [0002] In a hand device mounted on a robot arm, etc., an optical position device that detects the position of a target object is used, and the result of optically measuring the relative position of the target object and the hand is performed. feedback. Conventionally, as such an optical position detection device, an imaging element has been proposed (see Patent Documents 1 and 2). However, an optical position detection device using an imaging element is expensive, and it takes a long time to process an image of an imaging result. Furthermore, it is impossible to detect the strength of the hand holding the target object from the imaging result of the imaging element. [0003] On ...

AI Technical Summary

Problems solved by technology

[0007] However, in the technology described in Patent Document 3, when the target object is pressed into the light propagation medium, the state of the interface between the target object and the light propagation medium is not stable regardless of whether reflected light from the target object is detected.

Therefore, in the technology described in Patent Document 3, when the target object is pressed into the light propagation medium (light-transmitting member), there is a problem that the sag depth of the target object (the relative position of the target object with respect to the light-transmitting member) cannot be accurately detected. question

Images