Mitutoyo Corporation

Takanori Otsuka

Kazuhiko Kodama

Toru Yaku

Mikiya Teraguchi

Kazushi Kikuchi

Masaru Ogiwara

Taisuke Wakasa

Kouichi Yoshihara

Ryo Morita

Michio Nakamura

A scale fixating device includes a fixing block unmovably fixating a first end of a scale to an object, and a pulling block fixating a second end of the scale to the object while pulling the second end of the scale to the second end side. The pulling block includes a fixated base fixated to an object, a slide holding the second end of the scale and installed slidably with respect to the fixated base, and a pulling mechanism having a first end engaged to the slide and a second end engaged to the fixated base, the pulling mechanism pulling the slide toward the second end relatively with respect to the fixated base. The scale fixating device either prevents a friction force from changing between the slide and the fixated base or generates an extremely large friction force between the slide and the fixated base.

Scale fixating device

An encoder scale, displaced relative to a detector head, includes: an insulating substrate; a conductive adhesive layer that is formed on the insulating substrate; and conductive pattern layers that are formed on the adhesive layer in a shape enabling the detector head to detect a position, wherein: the adhesive layer electrically connects all the pattern layers and includes an out-of-detection-range pattern that extends outward from a position detection range of the detector head; and the out-of-detection-range pattern is grounded via a conductive member.

Encoder scale and manufacturing and attaching method thereof

A linear encoder includes a scale; a frame in which the scale is held, the frame having an opening that extends in a longitudinal direction of the frame; and a pair of elongated dustproof members arranged to face each other in the opening. At least a part of each dustproof member is elastically deformable. Each dustproof member includes a first end portion in a transverse direction of the dustproof member, a first projecting portion disposed on the first end portion, and a second end portion in the transverse direction. The opening has a pair of fitting recesses formed therein. The first end portion of each dustproof member is fitted in a corresponding one of the fitting recesses, and the first projecting portion contacts the corresponding one of the fitting recesses.

Linear encoder

An linear encoder includes: a scale; a light-emitting element that emits light onto the scale; a detecting head that has a light-receiving element that receives the light emitted by the light-emitting element to be reflected or transmitted by the scale; and a connector connected to the detecting head via a cable. The connector comprises a display that displays a status of the light received by the light-receiving element and a connector controller that controls the display. The connector controller includes a display controller that controls the display in accordance with the intensity of the light received by the light-receiving element.

Optical encoder

An optical encoder which is designed to convert light generated from a light source into parallel light rays by using a collimator lens, thereby allowing the collimated light to radiate to gratings (a first grating, a second grating and a third grating). A diffusing element (a diffusion plate or a diffusion surface) is provided between the light source and the collimator lens to mitigate the parallelization degree of light, thereby weakening the second-order and the third-order or high-order diffraction light. Consequently, even where a light emitting diode (LED) or laser diode (LD) is used as the light source, a favorable interference output can be obtained.

Optical encoder including aperture with diffusion element and collimator lens

An optical encoder () is provided with: a light-emitting element () including a main-signal light-emitting element () having a red LED (A) that emits red light and an origin light-emitting element () having an infrared LED (A) that emits infrared light; and a receiver unit () including a main-signal photo detector () that receives the red light to generate a predetermined signal and an origin photo detector () that receives the infrared light to generate a predetermined signal. Accordingly, even when the infrared light enters the main-signal photo detector () or the red light enters the origin photo detector (), no signal is generated by the light, thereby effectively preventing crosstalk. Thus, the measurement accuracy of the optical encoder () can be improved.

Crosstalk preventing optical encoder

An optical displacement-measuring instrument of a reflection type includes a sensor head movable above a scale in a direction of measurement. This instrument is of a three-grating type that comprises a first optical grating arranged close to a light source, a second optical grating arranged on the scale, and a third optical grating arranged in a photoreceptor. A light diffuser is arranged between the light source and the first optical grating. A collimated light from the light source is diffused at the light diffuser and led to the first optical grating.

Growing community of inventors

Utsunomiya, Japan

Takanori Otsuka