Mitsubishi Electric Corporation

Hideki Kunishio

Daisuke Ohama

Noriyuki Komori

Atsushi Michimori

Taku Matsuzawa

Toru Shiraki

Hiroaki Sugiura

Tetsuya Kuno

Takashi Itow

Masaaki Okada

Kozo Ishida

Norihiro Watanabe

Masaki Wakisaka

Hiroyuki Miyake

Yuki Okuhigashi

Ichihiro Abe

Masahiko Takashina

Yuji Tadano

An image reading device includes light guides () that emit light to an object to be read, a lens body () that condenses reflected light, a light receiver () that receives the reflected light, a sensor board () on which is mounted the light receiver (), a lens holder (), and a housing () that houses or holds these components. The lens holder () includes a holder bottom (), light guide positioners () and lens body holders (). In the lens holder (), the lens body () is attached between the lens body holders (), the sensor board () is attached to the holder bottom () such that the light receiver () aligns with an optical axis of the lens body (), and the light guides () are attached to the light guide positioners (). A surface of each light guide positioner () that faces the corresponding light guide () to be attached has at least a portion having a same shape a s a shape of a surface of the light guide.

Image reading device

An illumination device includes a light source and a rod-like light guide extending in a longitudinal direction for guiding incident light to an object to be illuminated. The light source is disposed at an end of the light guide extending in a longitudinal direction. The light guide includes an incident surface at the longitudinal end to receive light emitted from the light source, a flat emission surface to emit light incident on the light guide toward the object to be illuminated, a parabolic reflective surface to reflect, toward the emission surface, light from a focus of the paraboloid shape of the refractive surface or light passing through the focus from a predetermined area, and a light-scattering portion, having a predetermined area, to scatter light entering through the incident surface and reflect the light toward the reflective surface. The light-scattering portion is placed at the focus of the paraboloid shape or at a position where light reflected by the scattering area on the light-scattering portion passes through the focus.

Illumination device and image reading device

An objective of the present disclosure is to obtain a light guide and an image reading apparatus capable of efficiently irradiating an object to be irradiated (). The light guide and the image reading apparatus include a rod-shaped light guide main body () extending in the longitudinal direction, a first end face () that is an end face of the light guide main body () along the transverse direction, a light scattering pattern () that scatters light that enters from the first end face () and is guided inside the light guide main body (), and a light emission surface portion () formed on the light guide main body along a longitudinal direction, the light emission surface portion () being a surface from which the light scattered at the light scattering pattern () is emitted to outside the light guide main body () after being reflected on a wall surface of the light guide main body (). The light emission surface portion () includes a first light emission surface () that is disposed near the first end face () in the longitudinal direction and a second light emission surface () that is contiguous with the first light emission surface () in the longitudinal direction. A width of the first light emission surface () in the transverse direction is shorter than a width of the second light emission surface () in the transverse direction.

Light guide and image reading apparatus

The present invention provides a control device capable of improving hysteresis characteristics of a voice coil motor () and attaining a suitable lens position without complicating the structure of the control device. As solving means of the invention, a voice coil motor control device () includes a driving current control part () that controls a driving current supplied to the voice coil motor () in accordance with a driving pulse subjected to pulse width modulation, and a driving pulse control part () that divides a drive period of the voice coil motor () into a movement period and a holding period, and controls the driving pulse by changing the duty ratio of the driving pulse during the movement period in accordance with a duty setting value and fixing the duty ratio of the driving pulse during the holding period to the duty setting value.

Voice coil motor control device and method of driving the same, image pickup device

The present invention belongs to the field of an image capturing apparatus such as a camera for mobile phone and the like, and has an object to obtain a three axis lens shifting mechanism capable of achieving size reduction and cost reduction with simple structure and an image capturing apparatus equipped with such three axis lens shifting mechanism. A single magnetic circuit exerts an influence of a magnetic field produced by magnets () upon active sides of a focusing coil () and active sides of coils (), (). Therefore, movable parts () can be driven in the direction of optical axis (Z) only by controlling the direction of energizing the focusing coil (), and further, a first movable part () can be driven in a first direction (X) or second direction (direction of rotation) (Y) only by combination of the directions of energizing the coils (), (). This allows the sharing of the magnetic circuit and an electromagnetic actuator.

Lens shifting structure for image capturing apparatus

The driving device includes a bendable shape memory alloy member, a resilient member for applying a tension to the shape memory alloy member in a longitudinal direction thereof, a bending member for bending the shape memory alloy member, and a movable body moved by a displacement of the shape memory alloy member. The bending member contacts the shape memory alloy member, so that the tension is applied to the shape memory alloy member in the longitudinal direction thereof. Compared with the driving device in which the shape memory alloy member is linearly disposed, the decrease in the amount of displacement can be suppressed, so that a space efficiency can be enhanced and the downsizing of the driving device can be accomplished.

Drive device

Growing community of inventors

Chiyoda-ku, Japan

Hideki Kunishio