JPH0174508U - - Google Patents

Description

[Brief explanation of the drawing]

The attached drawings show an embodiment of the present invention, and FIGS. 1 and 2 A and B show an example of the configuration of an optical position sensor used in the present invention, and FIG. 3 is a conventional configuration diagram of a shutter with a slit. Figure 4 A is a plan view showing the relative positional relationship between the shutter with a slit and the one-dimensional position detecting element, and B is a side view and circuit showing the relative positional relationship between the light source, the one-dimensional position detecting element and the shutter with the slit. FIG. 5C is an explanatory diagram showing the relationship between the position of incident light on the one-dimensional position detection element and various regions. DESCRIPTION OF SYMBOLS 1... Light source, 2, 5, 7... Shutter with slit, 3... One-dimensional position detection element, 4... Arithmetic circuit, 6... Photo interrupter, 8... Position error correction means.

Claims (1)

[Scope of utility model registration request] It has a light-receiving surface of a predetermined length with electrodes at both ends, and the total photocurrent generated by the incident light on the light-receiving surface is divided in inverse proportion to the distance between the incident light position and each electrode. an output one-dimensional position detecting element, an arithmetic circuit for calculating the position of incident light on the light receiving surface by calculating the output current output from each electrode of the one-dimensional position detecting element, and a predetermined position of the one-dimensional position detecting element. It consists of a light source capable of emitting substantially parallel light beams over the entire length of the light-receiving surface, and a shutter with a slit, which is located between the light source and the light-receiving surface and has a slit that allows a portion of the light rays from the light source to pass through. , the combination of the light source and the one-dimensional position detection element, and the slit of the slit shutter of the optical position sensor attached to the two members that move the slit shutter relative to each other, in the direction of relative movement of the slit shutter. With respect to the light receiving surface of the one-dimensional position detecting element, which is arranged substantially orthogonally to On the other hand, in the case where the slits are arranged diagonally, the direction of the slits is parallel to the relative movement direction of the shutter with slits, and the slits arranged diagonally are one-dimensional position detecting elements at both ends of the slits of the shutter with slits. Reference area slits are provided in the outer portions of the measurement areas facing each other, and when the light-receiving surface of the one-dimensional position detection element is positioned facing each of the two reference area slits, each of the one-dimensional position detection elements is The mounting position error of the one-dimensional position detection element with respect to the slit shutter is calculated and stored from the output current output from the electrode, and the one-dimensional position detection element is transmitted through the slit of the slit shutter using the stored mounting position error. The present invention is characterized by being provided with a position error correcting means for correcting the position of the incident light incident on the light-receiving surface of the apparatus, and calculating the relative position between the shutter with the slit and the one-dimensional position detection element from the corrected position of the incident light. Optical position sensor.