Abstract: An ultraviolet laser device includes an oscillation stage laser outputting linearly polarized pulse laser light having an ultraviolet wavelength, an optical isolator arranged on an optical path between the oscillation stage laser and an amplifier, and a processor. The optical isolator includes a first polarizer, a first Faraday rotator rotating a polarization direction of the pulse laser light transmitted through the first polarizer in a first rotation direction, a second polarizer arranged so that the pulse laser light output from the first Faraday rotator is transmitted therethrough, a first actuator relatively moving the first magnet and the first Faraday material in an optical axis direction, and a first sensor measuring a power of pulse laser light reflected by the second polarizer among the pulse laser light output from the oscillation stage laser. The processor controls the first actuator based on a measurement result of the first sensor.

Abstract: An optical isolator includes an enclosure, a first polarizer disposed in the enclosure, a first Faraday rotator including a first Faraday material rotating a polarization direction of the light having passed through the first polarizer, and a first magnet producing a first magnetic field applied to a first magnetic field generation region where the first Faraday material is disposed, the first Faraday rotator disposed in the enclosure, and a first position adjustment mechanism moving the first Faraday material relative to the enclosure. A cross-sectional shape of the first Faraday material in a cross section perpendicular to an optical axis of the light passing through the first Faraday material and a cross-sectional shape of the first magnetic field generation region have major axes in the same direction. The first position adjustment mechanism moves the first Faraday material in the direction of a minor axis perpendicular to the major axis.

Abstract: In a laser system according to an aspect of the present disclosure, the following components are disposed: a first container that accommodates a first heater and a first crystal holder holding a first nonlinear crystal and includes a first light incident window via which laser light is incident and a first light exit window via which the laser light exits; a second container that accommodates a second heater and a second crystal holder holding a second nonlinear crystal and includes a second light incident window via which the laser light is incident and a second light exit window via which the laser light exits; and a stage that holds the first and second containers. A controller controls the stage to move the first nonlinear crystal away from the optical path of the laser light and inserts the second nonlinear crystal into the optical path of the laser light.

Abstract: A wavelength conversion apparatus according to an aspect of the present disclosure is a wavelength conversion apparatus that performs wavelength conversion of light through a non-linear crystal and including a first non-linear crystal, a container in which the first non-linear crystal is housed, a crystal holding member provided inside the container for fixing the first non-linear crystal, a first window provided to the container for guiding light to the first non-linear crystal from outside of the container, a second window provided to the container for guiding light output from the first non-linear crystal to outside of the container, a first heater provided inside the container for heating the first non-linear crystal, a battery that supplies electric power to the first heater, and a first controller that controls electric power supply to the first heater.

Abstract: A wavelength conversion system according to an aspect of the present disclosure includes a first crystal holder holding a first non-linear crystal, a second crystal holder holding a second non-linear crystal, a third crystal holder holding a third non-linear crystal, and a container housing the holders. The container has an entrance window and an emission window. The first non-linear crystal, the second non-linear crystal, and the third non-linear crystal are disposed in this order on an optical path of a laser beam traveling from the entrance window to the emission window. The crystal holders are rotatable. A first rotational axis that is a rotational axis of the first crystal holder is orthogonal to a second rotational axis that is a rotational axis of the second crystal holder, and the first rotational axis is parallel to a third rotational axis that is a rotational axis of the third crystal holder.

Abstract: In a laser system according to an aspect of the present disclosure, the following components are disposed: a first container that accommodates a first heater and a first crystal holder holding a first nonlinear crystal and includes a first light incident window via which laser light is incident and a first light exit window via which the laser light exits; a second container that accommodates a second heater and a second crystal holder holding a second nonlinear crystal and includes a second light incident window via which the laser light is incident and a second light exit window via which the laser light exits; and a stage that holds the first and second containers. A controller controls the stage to move the first nonlinear crystal away from the optical path of the laser light and inserts the second nonlinear crystal into the optical path of the laser light.

Abstract: A wavelength converter including: A. a crystal holder configured to hold a nonlinear crystal configured to convert a wavelength of a laser beam incident thereon and output the wavelength-converted laser beam; B. a first container configured to accommodate the crystal holder and include a light incident window so provided as to intersect an optical path of the laser beam incident on the nonlinear crystal and a light exiting window so provided as to intersect the optical path of the laser beam having exited out of the nonlinear crystal; C. a second container configured to accommodate the first container; D. a position adjusting mechanism configured to adjust at least a position of the first container; and E. an isolation mechanism configured to spatially isolate the light incident window and the light exiting window from the position adjusting mechanism.

Abstract: A wavelength converter including: A. a crystal holder configured to hold a nonlinear crystal configured to convert a wavelength of a laser beam incident thereon and output the wavelength-converted laser beam; B. a first container configured to accommodate the crystal holder and include a light incident window so provided as to intersect an optical path of the laser beam incident on the nonlinear crystal and a light exiting window so provided as to intersect the optical path of the laser beam having exited out of the nonlinear crystal; C. a second container configured to accommodate the first container; D. a position adjusting mechanism configured to adjust at least a position of the first container; and E. an isolation mechanism configured to spatially isolate the light incident window and the light exiting window from the position adjusting mechanism.

Abstract: A wavelength converting apparatus includes a moving device including a crystal holder holding a nonlinear crystal for converting a wavelength of laser light incident thereon and outputting the laser light, and a driving unit including a voice coil motor and moving the holder at least in a direction orthogonal to a first direction that is an optical path axis direction of the laser light. The driving unit turns the holder to change an incident angle of the laser light on the crystal. The driving unit includes: a two-dimensional driving unit including a planar voice coil motor, and a one-dimensional driving unit including a cylindrical voice coil motor. The two-dimensional driving unit performs linear driving in a second direction orthogonal to the first direction, and rotary driving around a third direction orthogonal to the first and second directions. The one-dimensional driving unit performs linear driving in the third direction.

Abstract: A wavelength converting apparatus includes a moving device including a crystal holder holding a nonlinear crystal for converting a wavelength of laser light incident thereon and outputting the laser light, and a driving unit including a voice coil motor and moving the holder at least in a direction orthogonal to a first direction that is an optical path axis direction of the laser light. The driving unit turns the holder to change an incident angle of the laser light on the crystal. The driving unit includes: a two-dimensional driving unit including a planar voice coil motor, and a one-dimensional driving unit including a cylindrical voice coil motor. The two-dimensional driving unit performs linear driving in a second direction orthogonal to the first direction, and rotary driving around a third direction orthogonal to the first and second directions. The one-dimensional driving unit performs linear driving in the third direction.

Abstract: A mirror box includes a mirror that is selectively set to one of a reflecting position, which is on an optical path between a photographing lens and an imaging device so that incident light passing through the photographing lens is reflected to a view-finder, and a retracted position, which is out of the optical path so that said incident light is led to the imaging device. A filter is selectively set to one of a non-functioning position, which is close to the mirror, when the mirror is set to the reflecting position, and a functioning position, which is on the optical path so that a predetermined light component contained in the incident light is blocked, when the mirror is set to the retracted position. The filter comprises an optical low-pass filter, and the mirror comprises a half-mirror which is integrally provided on an incident surface of the optical low-pass filter.

Abstract: A mirror box includes a mirror that is selectively set to one of a reflecting position, which is on an optical path between a photographing lens and an imaging device so that incident light passing through the photographing lens is reflected to a view-finder, and a retracted position, which is out of the optical path so that said incident light is led to the imaging device. A filter is selectively set to one of a non-functioning position, which is close to the mirror, when the mirror is set to the reflecting position, and a functioning position, which is on the optical path so that a predetermined light component contained in the incident light is blocked, when the mirror is set to the retracted position. The filter comprises an optical low-pass filter, and the mirror comprises a half-mirror which is integrally provided on an incident surface of the optical low-pass filter.

Abstract: A mirror box comprises a quick return mirror and an optical low-pass filter. When observing a subject image, the quick return mirror is set to a reflecting position, in which the quick return to mirror is inclined to the optical axis of a photographing lens group by approximately 45 degrees so that incident light is reflected to a view-finder. The optical low-pass filter is set to a non-functioning position, in which the optical low-pass filter is inclined to be parallel to the quick return mirror, and is close to the quick return mirror. When carrying out a photographing operation, the quick return mirror is retracted from the optical axis, and is set to a retracted position, which is parallel to the optical axis. The optical low-pass filter is set to a functioning position which is perpendicular to the optical axis.

Abstract: A digital camera having a camera body includes a small memory card receiving member, a large memory card receiving member having a width larger than the width of the small memory card receiving member, and a forward projecting portion having a inclined portion which gradually protrudes in a forward direction toward a bottom portion of the camera body, the forward projecting portion being located below a lens barrel of the digital camera. The small and large memory card receiving members are provided within the forward projecting portion in the camera body, the small memory card receiving member being located above the large memory card receiving member and located within the inclined portion in the camera body. A front end of the small memory card receiving member is located at a position more rearward than a front end of the large memory card receiving member.

Abstract: A torque limiter mechanism includes an input part, an output part, and a transmitting member. The transmitting member transmits rotation of the input part to the output part. One of the input and output part includes a ring member that is provided with pairs of stop sections. The remaining one of the input and output part includes a shaft. The transmitting member includes a squeezing section that contacts the shaft, and a pair of legs that is engageable with a pair of stop sections. When a torque exceeding a predetermined value is induced between the input and output parts, a space between the legs is varied, so that a retaining force of the squeezing section against the shaft is released or reduced. Further, each of the pairs of the stop sections is preset to different distances.

Abstract: A lens-drive mechanism for a camera is provided that includes a drive source, an output shaft, and a detector. The output shaft has a joint which is connected to a lens barrel attached to a camera body. The output shaft is rotated by a driving force from the drive source and transmits the rotation to the lens barrel through the joint. The detector has a rotating disk that rotates together with the output shaft. The detector detects rotation of the output shaft by detecting rotation of the rotating disk. The rotating disk is so arranged that a rotational axis of the rotating disk substantially coincides with a rotational axis of the output shaft.

Abstract: A digital camera includes a position sensor which detects a position of the camera body relative to the direction of gravity, an acceleration sensor which detects an acceleration acted upon the camera body, a memory in which image data of a captured image is recorded, and a controller. If the magnitude of the acceleration detected by the acceleration sensor when the captured image is produced is smaller than a predetermined value, the controller records the image data in the memory together with positional data of the camera body that is detected by the position sensor. If the magnitude of the acceleration detected by the acceleration sensor when the captured image is produced is equal to or greater than the predetermined value, the controller deems the data on the position of the camera body as invalid data and records only the image data in the memory.

Abstract: A card slot door locking mechanism including a pair of doors, each of the pair of doors being rotatable between a closed position and an open position, and being biased to the closed position; a pair of open guide surfaces which are formed on each respective door of the pair of doors so that the pair of doors concurrently rotate to the open position when the pair of open guide surfaces are concurrently pushed by the removable card; and a pair of barrier surfaces which are formed on each respective door of the pair of doors so that at least one of the pair doors is prevented from rotating toward the open position when at least one of the pair of barrier surfaces is pushed by an object other than the removable card without pushing the pair of open guide surfaces concurrently.

Abstract: A digital camera has a compact front surface due to a white-balance sensor and an electronic flash device being connected to each other, as one rotatable body. Further, both the light accepting angle and the illuminating angle are automatically adjusted to correspond to an angle of view, by movement of the rotatable body. Therefore, a camera comprising a zooming system is able to adjust the white balance, and emit stroboscope light efficiently.

Abstract: An electronic still camera includes a camera body having a photographic optical system, and a monitor device detachably attached to the camera body. The monitor device has an image indication portion in which an object image obtained by the photographic optical system can be indicated. The monitor device can be electrically connected to the camera body when the monitor device is attached to the camera body and is rotatable about a rotation axis provided in the camera body within a predetermined range of angular displacement. The monitor device can be detachably attached to the camera body in any direction within the predetermined angular displacement range.