Abstract: A small-sized aperture assembly includes a base plate, an optical shutter fixed to the base plate, a motor providing a driving force, a linkage mechanism with one end connected to the motor, and a transition gear located between the linkage mechanism and the optical shutter. A periphery of the optical shutter is provided with a sawtooth segment meshed with the transition gear, and the other end of the linkage mechanism is hinged to the transition gear, so that the linkage mechanism drives the transition gear to move under the driving of the motor, and enables the optical shutter to switch between a closed state and an open state.

Abstract: A patch cord for transmitting between a single mode fiber (SMF) and a multi-mode fiber (MMFs) has a MMF, SMF, and a photonic crystal fiber (PCF) with a hollow core placed between the SMF and MMF. A mode field diameter (MFD) of the PCF hollow core section is in the range of 16 to 19 microns, the length of the PCF is between 1 cm to 10 cm, the MMF has 50+2 microns core diameter, the SMF has a 6-9 microns core diameter, and the coupling between the PCF mode to the MMF fundamental mode is maximized.

Abstract: A multi-shield plate includes a plurality of windows and a plurality of vapor shields mounted to the plurality of windows, wherein each window of the plurality of windows is formed in the plate and extends through an entirety of the plate in a thickness direction. The multi-shield plate further includes a plurality of apertures in the plate, wherein each of the plurality of apertures extends through the entirety of the plate in the thickness direction and, an aperture of the plurality of apertures is aligned with a corresponding window of the plurality of windows along radius of the multi-shield plate.

Abstract: Systems and methods manage information relating to paper media to enhance the quality of printing by printers. Systems and methods efficiently maintain color management profiles for different papers and ensure that the most appropriate (e.g., optimal) color management profile is employed for color conversion on a specific paper. In particular, embodiments may employ dynamic management of data stored in paper catalogs of printing systems. As such, a paper catalog of a printer can effectively associate a paper with a color management profile that provides the best possible color reproduction on that paper.

Abstract: A rearview mirror with display function includes a display structure layer, a rearview mirror structure layer, a plastic frame and an electrochromic material. The display structure layer includes a first transparent substrate, a display body layer and a transflective layer on opposite sides of the first transparent substrate. The rearview mirror structure layer is disposed on one side of the display structure layer, and includes a second transparent substrate, a ring-shaped shielding layer, a touch sensing layer, an insulating substrate, and a transparent electrode layer. The ring-shaped shielding layer is disposed around a third surface of the second transparent substrate, and the touch sensing layer covers the third surface and the ring-shaped shielding layer. The ring-shaped shielding layer is electrically insulated from the touch sensing layer. The plastic frame, the transflective layer and the transparent electrode layer define an accommodating space.

Abstract: Systems and methods manage information relating to paper media to enhance the quality of printing by printers. Systems and methods efficiently maintain color management profiles for different papers and ensure that the most appropriate (e.g., optimal) color management profile is employed for color conversion on a specific paper. In particular, embodiments may employ dynamic management of data stored in paper catalogs of printing systems. As such, a paper catalog of a printer device can effectively associate a paper with a color management profile that provides the best possible color reproduction on that paper.

Abstract: An electronic display includes a display panel that operates in a single display mode to provide a single display, or a dual display mode to provide two displays separated by an inactive region. The electronic display includes the display panel and a panel driver. The display panel includes a left pixel region, a right pixel region, and a middle pixel region between the left and right pixel regions. In the single display mode of the electronic display, the panel driver provides first gate signals generated from first input data to the left, right, and middle pixel regions. In a dual display mode, the panel driver provides second gate signals generated from second input data to the left and right pixel regions. The first input data has a first resolution that is larger than a second resolution of the second input data.

Abstract: An electronic device such as a wearable device may have an optical sensor. The optical sensor may have a light source such as one or more visible-light light-emitting diodes or other light-emitting devices and may have a light detector formed from one or more photodetectors. The wearable device may have a wearable housing in which the optical sensor is mounted. During operation, light from the light source may pass through a transparent portion of the housing, may reflect from an external object such as a wrist or other body part of a user, and may be received by the photodetectors after passing through light control members. The light control members may be arranged in a ring with a center and may have curved shapes with concave surfaces that face the center. Each light control member may be formed from a stack of laminated bent light control films.

Abstract: An optical arrangement for light beam shaping in a light microscope has a first and a second liquid crystal region, each of which has a plurality of independently switchable liquid crystal elements with which a phase of incident light is changeable in a settable manner. A first polarization beam splitter is arranged in such a way that incident light is split in a polarization-dependent manner into reflection light, which is reflected in the direction of the first liquid crystal region, and transmission light, which is transmitted in the direction of the second liquid crystal region. The first or a second polarization beam splitter is arranged such that the reflection light and transmission light are combined onto a common beam path after phase modulation by means of the liquid crystal regions.

Abstract: Systems and methods manage information relating to paper media to enhance the quality of printing by printers. Systems and methods efficiently maintain color management profiles for different papers and ensure that the most appropriate (e.g., optimal) color management profile is employed for color conversion on a specific paper. In particular, embodiments may employ dynamic management of data stored in paper catalogs of printing systems. As such, a paper catalog of a printer can effectively associate a paper with a color management profile that provides the best possible color reproduction on that paper.

Abstract: In a first aspect, a single layer polymer film includes 60 to 99 wt % of a crosslinked polyimide, having a gel fraction in the range of from 20 to 100% and a refractive index of 1.74 or less, and 1 to 40 wt % of a colorant. A surface of the single layer polymer film has been textured and has a maximum roughness (Spv) of 6 ?m or more, an L* color of 30 or less and a 60° gloss of 15 or less. In a second aspect, a coverlay for a printed circuit board includes the single layer polymer film of the first aspect. In third and fourth aspects, processes are disclosed for forming a single layer polymer film including a crosslinked polyimide film including a dianhydride and a diamine.

Abstract: An electronic display includes a display panel that operates in a single display mode to provide a single display, or a dual display mode to provide two displays separated by an inactive region. The electronic display includes the display panel and a panel driver. The display panel includes a left pixel region, a right pixel region, and a middle pixel region between the left and right pixel regions. In the single display mode of the electronic display, the panel driver provides first gate signals generated from first input data to the left, right, and middle pixel regions. In a dual display mode, the panel driver provides second gate signals generated from second input data to the left and right pixel regions. The first input data has a first resolution that is larger than a second resolution of the second input data.

Abstract: The present disclosure is directed to a lens cap with an integrated iris that screws onto a camera lens. Once secured on a camera lens, the iris may be opened by rotating an outer edge of the lens cap in a first direction. When in an open position, the entire surface of the camera lens is free from obstruction and photos may be taken as if the lens cap were not even there. The iris can literally disappear within an edge of circular lens cap. By rotating the lens cap in an opposite direction, the lens may be completely covered by the integrated iris again. For example, the iris may be opened by rotating the lens cap in a clockwise direction and then closed again by rotating the lens cap in a counter clockwise direction. Once installed, this lens cap never has to be removed.

Abstract: A signpost-based navigation method, a computer readable storage medium, and an electronic device that implements the method. The method comprises: capturing a visible light signal emitted by a road sign, the visible light signal comprising multiple pieces of different signpost information; selecting, according to indication information corresponding to a current position of a vehicle on a navigation path, at least one piece of signpost information from the multiple pieces of different signpost information as signpost information of a current signpost; and controlling a shutter of shutter glasses so as to display the current signpost through the shutter glasses.

Abstract: An optical scanning device includes: a first waveguide that propagates light by total reflection; and a second waveguide. The second waveguide includes: a first multilayer reflective film; a second multilayer reflective film that faces the first multilayer reflective film; and a first optical waveguide layer directly connected to the first waveguide and located between the first and second multilayer reflective films. The first optical waveguide layer has a variable thickness and/or a variable refractive index and propagates the light transmitted through the first waveguide. The first multilayer reflective film has a higher light transmittance than the second multilayer reflective film and allows part of the light propagating through the first optical waveguide layer to be emitted to the outside. By changing the thickness of the first optical waveguide layer and/or its refractive index, the direction of the part of the light emitted from the second waveguide is changed.

Abstract: An electronic display includes a display panel that operates in a single display mode to provide a single display, or a dual display mode to provide two displays separated by an inactive region. The electronic display includes the display panel and a panel driver. The display panel includes a left pixel region, a right pixel region, and a middle pixel region between the left and right pixel regions. In the single display mode of the electronic display, the panel driver provides first gate signals generated from first input data to the left, right, and middle pixel regions. In a dual display mode, the panel driver provides second gate signals generated from second input data to the left and right pixel regions. The first input data has a first resolution that is larger than a second resolution of the second input data.

Abstract: A method for imaging a tissue of an eye, the method including the steps of providing oblique illumination to the eye by a plurality of light emitting areas of a light delivery device, the plurality of light emitting areas being independently controllable and arranged to direct light towards at least one of a retina and an iris of the eye, causing an output beam from light backscattered from the at least one of the retina and the iris by the oblique illumination, capturing the output beam with an imaging system to provide a sequence of images of a fundus of the eye, and retrieving a phase and absorption contrast image from the sequence of images of the fundus, wherein the sequence of images of the fundus of the step of capturing is obtained by sequentially turning on one or more of the plurality of light emitting areas at a time in the step of providing the oblique illumination.

Abstract: An aperture module includes a rotary plate disposed on an upper portion of a base, an aperture driving unit rotating the rotary plate, and four blades interlocked with rotation of the rotary plate, and forming entrance holes having various sizes through combinations. The four blades are disposed on respective fixing shafts disposed on the base and rotated and driven around the respective fixing shafts, and the fixing shafts are interconnected to form a rectangle having a long side and a short side.

Abstract: The present application describes a technique for enhancing an electronic version of a maintenance manual or procedure with an interactive workflow, and presenting the enhanced electronic document using mobile computing devices that can be operated easily hands-free. The workflow primarily consists of a set of interactive checklist items that a maintenance specialist can mark complete via a spoken command. The enhanced electronic documents are additionally associated with supplemental multimedia content, presented contextually based on the currently selected and active checklist item. Furthermore, the document viewing application provides for integrated reporting functionality, enabling a maintenance specialist to capture relevant information during the maintenance procedure, for subsequent use in generating and submitting a report either electronically or via hard copy.

Abstract: A display device according to an embodiment of the present invention comprises: a first substrate to which external light is applied; a first and a second control electrode disposed on the first substrate, the second control electrode being spaced apart from the first control electrode; an insulating film disposed on the first and the second control electrode; a first and a second contact electrode formed on the insulation film, wherein the first contact electrode at least partially overlaps the first control electrode, and the second contact electrode is spaced apart from the first contact electrode and at least partially overlaps the second control electrode; a shuttering operation body moving between the first and the second contact electrode so as to transmit or block light; a second substrate opposite to the first substrate; and a quantum dot film disposed on the first or the second substrate and adjusting the wavelength of light passing through the shuttering operation body.

Abstract: A lens cover selectively covers and exposes a camera lens on a mobile device, such as a cellular phone, laptop or tablet. The lens cover can be adhered to the mobile device. The lens cover has a slider that slides between an open position and a closed position. Indicium is disposed on the exposed face of the slider that is indicative of or representing a business, a product, or both. The base and the slider have perimeters with a length less than approximately 20 mm and a height less than or equal to 8 mm, and/or a ratio of approximately 19:8.

Abstract: Provided are an apparatus and a method that can acquire a shaded three-dimensional image having a high contrast for a thick cell culture specimen. Provided are an apparatus and a method that observe a biological sample accommodated in a container by a modulation contrast method using a near-infrared wavelength, at least the bottom surface of the container being formed of a plastic raw material.

Abstract: An electronic display includes a display panel that operates in a single display mode to provide a single display, or a dual display mode to provide two displays separated by an inactive region. The electronic display includes the display panel and a panel driver. The display panel includes a left pixel region, a right pixel region, and a middle pixel region between the left and right pixel regions. In the single display mode of the electronic display, the panel driver provides first gate signals generated from first input data to the left, right, and middle pixel regions. In a dual display mode, the panel driver provides second gate signals generated from second input data to the left and right pixel regions. The first input data has a first resolution that is larger than a second resolution of the second input data.

Abstract: A liquid crystal display includes: a display panel; and a color conversion layer positioned on the display panel, wherein the color conversion layer includes a scattering layer including a color conversion media layer and scatterers.

Abstract: An aperture module includes blades to form an incident hole having a variable size, a magnet portion including a driving magnet opposing a driving coil to allow the magnet portion to be linearly movable, and a rotation plate linked to the magnet portion and to the blades to convert linear motion of the magnet portion into rotational motion of the blades. The blades include a first blade having N sides (N being a positive integer) that form the incident hole, and a second blade having (N+1) sides that form the incident hole. The incident hole is in the form of a polygon having an odd number of sides.

Abstract: A display apparatus may be provided that includes: a transparent display panel; a blind panel which is disposed adjacent to the transparent display panel and includes a plurality of cells that are individually drivable; and a controller which changes an operation mode through an on/off of the transparent display panel and a selective drive of a cell included in the blind panel. As a result, the display apparatus according to the embodiment of the present invention is a transparent display apparatus using the OLED. The display apparatus is able to operate without the external environmental constraints and to operate in various modes including the display function.

Abstract: A privacy shutter selectively covers and exposes a camera lens on a computer device. The privacy shutter has a frame with an aperture and a slider carried by the frame and slidable in the aperture. The slider slides between open and closed positions. The frame has a channel in an outer side of the frame and extending from the aperture to a perimeter of the frame. The channel has an outer opening and an inner cavity slidably receiving the slider therein. The outer opening of the channel exposes the outer surface of the slider in both the closed and opened positions.

Abstract: When trace image data is obtained while a probe is used to scan a region on a sample in a forward direction and retrace image data is obtained while the same region is scanned in the reverse direction, a deviation information storage unit stores deviation detected by a deviation detection unit. This deviation is an indication of the difference between the distance between the probe and the sample and a target value for the distance at a given point in time. An image data selection unit compares the deviation during forward scanning and the deviation during reverse scanning for each measurement point, selects the image data obtained during scanning that has the smaller deviation, and stores the same to a storage region of an image data storage unit as selected image data.

Abstract: A method for making a chalcogenide glass waveguide in a liquid crystal-based non-mechanical beam steering device that permits steering in the mid-wave infrared. The waveguide core, the subcladding, or both comprise a chalcogenide glass. A mask is used to produce a tapered subcladding. Also disclosed is the related non-mechanical beam steering device that includes a chalcogenide waveguide.

Abstract: A geospatial data collection system is for an aerial vehicle and includes a data collection light detection and ranging (LiDAR) device and a protection LiDAR device. The data collection LiDAR device is configured to collect geospatial data as the aerial vehicle moves along a collection path. The protection LiDAR device is configured to sense a geospatial area ahead of the data collection LiDAR device. The data collection LiDAR device is switchable from an operating mode to a protected mode based upon the protection LiDAR device.

Abstract: An electronic display includes a display panel that operates in a single display mode to provide a single display, or a dual display mode to provide two displays separated by an inactive region. The electronic display includes the display panel and a panel driver. The display panel includes a left pixel region, a right pixel region, and a middle pixel region between the left and right pixel regions. In the single display mode of the electronic display, the panel driver provides first gate signals generated from first input data to the left, right, and middle pixel regions. In a dual display mode, the panel driver provides second gate signals generated from second input data to the left and right pixel regions. The first input data has a first resolution that is larger than a second resolution of the second input data.

Abstract: A stop apparatus including stop blades; a supporting member supporting stop blades rotatably about rotating centers; and a rotating member rotating the stop blades, one of the stop blades or the rotating members, having protruded parts, and the other having recessed parts engaging with the protruded parts, the stop blades including: close blades forming close state by rotating in a direction of closing an opening both during stopping down the opening from open state to predetermined opening diameter state and during stopping down the opening from the predetermined opening diameter state to the close state; and non-close blades rotating in the direction of closing the opening during stopping down the opening from the open state to the predetermined opening diameter state and rotating in a direction of opening the opening during stopping down the opening from the open state from the predetermined opening diameter state to the close state.

Abstract: A component carrier for carrying and cooling at least one heat generating electronic component is presented. The component carrier comprising includes an outer layer structure, an electrically insulating layer arranged adjacent to the outer layer structure, and a heat conducting structure arranged adjacent to the electrically insulating layer on a side opposite to the outer layer structure. The heat conducting structure is thermally coupled to the at least one heat generating electronic component such that the outer layer structure receives thermal radiation irradiated by the heat conducting structure and transports corresponding heat away from the component carrier via convection by a heat transfer medium surrounding the component carrier.

Abstract: An autofocus driving unit for moving a lens holder supporting at least one lens in an optical axis direction with respect to an image sensor. The autofocus driving unit includes: a lead screw that has a length in a direction parallel to an optical axis and rotates to move the lens holder in the optical axis direction; a first driving source that rotates the lead screw so that the lead screw moves in multiple integers of a first distance in the optical axis direction and that comprises a rotor mounted in an outer circumference of the lead screw and a stator that is spaced apart from the rotor and rotates the rotor; and a second driving source that moves the lead screw and the rotor in a first direction that is parallel to the optical axis with respect to the stator so that the lens holder is moved by a second distance that is different from the first distance in the optical axis direction.

Abstract: A double-sided display is provided. The double-sided display comprises: a display panel, and a first reflective layer and a second reflective layer respectively arranged on both sides of the display panel, and light conversion layers arranged on an outer side of the first reflective layer and an outer side of the second reflective layer.

Abstract: A method for preparing tool paths for use in a computer numerically controlled machine whereby the appearance of undesirable horizontal tool marks are minimized, comprised of identifying a surface texture and resolving the surface texture into at least one contour and identifying an underlying relief. A tool path is then prepared which is suitable for use in a computer numerically controlled machine wherein the tool path moves in accordance with the at least one contour of the identified surface texture while simultaneously carving the underlying relief.

Abstract: Monitoring device and method for monitoring a fluid in subsea equipment, wherein the monitoring device includes a sensing element in contact with the fluid, at least one detector and a waveguide, where the sensing element is configured to implement an evanescent field absorption technique, the at least one detector is configured to detect an attenuated optical signal fed into the waveguide by at least one radiation source, and where the attenuation is caused by evanescent field absorption due to the fluid.

Abstract: A vehicle is provided that includes one or more wheels positioned at a bottom side of the vehicle. The vehicle also includes a first light detection and ranging device (LIDAR) positioned at a top side of the vehicle opposite to the bottom side. The first LIDAR is configured to scan an environment around the vehicle based on rotation of the first LIDAR about an axis. The first LIDAR has a first resolution. The vehicle also includes a second LIDAR configured to scan a field-of-view of the environment that extends away from the vehicle along a viewing direction of the second LIDAR. The second LIDAR has a second resolution. The vehicle also includes a controller configured to operate the vehicle based on the scans of the environment by the first LIDAR and the second LIDAR.

Abstract: An electronic device may have a camera module for acquiring still and video digital images of a subject. A light source such as a light-emitting diode may serve as a flash for the camera module. A shutter may be mounted above the light-emitting diode. When the light-emitting diode is not being used to produce a flash of light for illuminating the subject, the shutter may be closed to block the light-emitting diode from view by a user. During image acquisition operations in which it is desired to illuminate the subject, the shutter may be opened to allow light from the light-emitting diode to exit the electronic device. The electronic device may have a touch screen display with an active region and an inactive region. The camera module and light source may be mounted under a portion of the inactive region of the display. The shutter may include a filter structure.

Abstract: An illumination apparatus according to the present invention includes a light source, a reflecting mirror, an optical system, and a calculator. The reflecting mirror includes a first reflector and a second reflector, and is capable, while changing a reflection angle, of reflecting and directing at an object a first divided light, the first divided light being a portion of light from the light source emitted at the first reflector. The optical system divides the light from the light source into the first divided light and a second divided light, and guides the second divided light to the second reflector. The calculator is capable of calculating the reflection angle of the reflecting mirror by receiving the second divided light reflected by the second reflector.

Abstract: A metal layer is formed on a highly light-transmissive substrate; a resist mask having an opening pattern is formed on the metal layer; exposed portions of the metal layer is etched away in this state to form openings; then the resist mask is removed; and a surface of the metal layer and an inner side wall of each of the openings are oxidized to form a metal oxide layer. Thus, a front surface and a rear surface of the aperture plate are caused to have different reflectances. The oxide layer is formed at the same time as when the resist mask is ashed to remove resist.

Abstract: A light irradiation apparatus and a method of manufacture a photo-aligning layer are disclosed. A mask included in a light irradiation apparatus according to one embodiment is configured to irradiate the light having straightness at a high level of illumination to a subject that is apart from the mask with a certain distance. A photo-aligning layer with a desired alignment pattern can be fabricated using the mask.

Abstract: An optical time delay control device for controllably altering the transit time of an optical beam between two points. In one example, the device may include an optically transparent solid medium for receiving the optical beam, wherein at least a portion of the medium is generally a parallel piped shape characterized by a height, length and width, wherein the length is larger than the height; two mirrors affixed to two opposing parallel surfaces of the optically transparent solid medium, so that during operation the optical beam reflects between the two mirrors as the optical beam travels through the optically transparent medium; and an angle actuator for controllably altering the angle at which the optical beam enters into the optically transparent medium, thereby controllably altering the time that the optical beam travels through the device. This in effect permits control of the amount of delay of the transmission of light, and delays of 20 nanoseconds have been achieved.

Abstract: This disclosure provides systems, methods and apparatus for touch and gesture recognition, using a field sequential color display. The display includes a processor, a lighting system, and an arrangement for spatial light modulation that includes a number of apertures, and devices for opening and shutting the apertures. A light directing arrangement includes at least one light turning feature. The display lighting system is configured to emit visible light and infrared (IR) light through at least a first opened one of the plurality of apertures. The light turning feature is configured to redirect IR light emitted through the opened aperture into at least one lobe, and to pass visible light emitted by the display lighting system through the opened aperture with substantially no redirection.

Abstract: During mask inspection it is necessary to identify defects which also occur during wafer exposure. Therefore, the aerial images generated in the resist and on the detector have to be as far as possible identical. In order to achieve an equivalent image generation, during mask inspection the illumination and, on the object side, the numerical aperture are adapted to the scanner used. The invention relates to a mask inspection microscope for variably setting the illumination. It serves for generating an image of the structure (150) of a reticle (145) arranged in an object plane in a field plane of the mask inspection microscope. It comprises a light source (5) that emits projection light, at least one illumination beam path (3, 87, 88), and a diaphragm for generating a resultant intensity distribution of the projection light in a pupil plane (135) of the illumination beam path (3, 87, 88) that is optically conjugate with respect to the object plane.

Abstract: An arrangement utilizes diffractive, reflective and/or refractive optical elements combined to intensify and homogenize electromagnetic energy, such as natural sunlight in the terrestrial environment, for purposes such as irradiating a target area with concentrated homogenized energy. A heat activated safety mechanism is also described.

Abstract: An arm member is capable of moving to a first position, a second position, a third position, and a fourth position, in order, by driving a stepping motor in one direction. A shutter blade is in a closed state and a light quantity adjustment blade is in an insertion state when the arm member is at the first position, the shutter blade is in an open state and the light quantity adjustment blade is in the insertion state when the arm member is at the second position, the shutter blade is in the open state and the light quantity adjustment blade is in the evacuation state when the arm member is at the third position, and the shutter blade is in the closed state and the light quantity adjustment blade is in the evacuation state when the arm member is at the fourth position.

Abstract: A luminous flux limit device, an optical scanning unit employing the luminous flux limit device, and an electrophotographic image forming apparatus are provided. The luminous flux limit device is a device that limits a luminous flux of the optical scanning unit and includes a body portion with an aperture and a light-blocking portion that prevents light from being transmitted via a portion of the aperture. The aperture includes a blocking region in which light is blocked by the light-blocking unit, and a transmissive region that is a remaining region of the aperture excluding the blocking region.

Abstract: Methods and systems for reconfiguring an aperture of an optical inspection system are presented. A programmable aperture system includes a two dimensional array of mechanical pixels that selectively block light passing through the aperture. An array of linear guiding elements is aligned parallel to one another, and each row of mechanical pixels is supported by a corresponding linear guiding element. Each mechanical pixel is configured to slide along the corresponding linear guiding element when pushed by an actuator subsystem. The actuator subsystem repositions one or more of the mechanical pixel elements to change the shape of the aperture. The actuator subsystem is configured to selectively engage one or more mechanical pixel elements and translate the one or more mechanical pixel elements along corresponding linear guiding elements to a new position.

Abstract: There are provided an illumination unit and a display apparatus which are capable of improving convenience for users. The illumination unit includes a light source section including a laser light source, an optical device allowing a laser beam from the laser light source to pass therethrough, a drive section allowing the optical device to oscillate, and a control section performing one or both of control of decreasing brightness of emitted light from the light source section and control of outputting to the outside information that oscillation of the optical device has been stopped when the oscillation of the optical device has been stopped during drive operation by the drive section.