Abstract: There is provided a limited-area reflection type optical sensor having an emitted light lens and a reflected light lens. An opposite-light-receiver-side portion opposite to a light receiver side constitutes a first curvature surface having a first curvature while a light-receiver-side portion on the light receiver side with respect to the opposite-light-receiver-side portion constitutes a second curvature surface having a second curvature smaller than the first curvature in the emitted light lens provided in an optical path of the emitted light. An opposite-light-emitter-side portion opposite to a light emitter side constitutes a fourth curvature surface having a fourth curvature while a light-emitter-side portion on the light emitter side with respect to the opposite-light-emitter-side portion constitutes a fifth curvature surface having a fifth curvature smaller than the fourth curvature in the reflected light lens provided in an optical path of the reflected light.

Abstract: A wide-angle imaging device configured to photograph a first range, having an imaging element that photographs an image at a second range, wherein the first range has an angle of view wider than the second range, a visual field switching optical system comprising at least one optical element, and an optical system driving mechanism that moves the optical element of the visual field switching optical system. The optical element has a refractive type prism that refracts light incident from a visual field in a direction inclined with respect to an optical axis direction to collect the light to the imaging element.

Abstract: There is provided a limited-area reflection type optical sensor having an emitted light lens and a reflected light lens. An opposite-light-receiver-side portion opposite to a light receiver side constitutes a first curvature surface having a first curvature while a light-receiver-side portion on the light receiver side with respect to the opposite-light-receiver-side portion constitutes a second curvature surface having a second curvature smaller than the first curvature in the emitted light lens provided in an optical path of the emitted light. An opposite-light-emitter-side portion opposite to a light emitter side constitutes a fourth curvature surface having a fourth curvature while a light-emitter-side portion on the light emitter side with respect to the opposite-light-emitter-side portion constitutes a fifth curvature surface having a fifth curvature smaller than the fourth curvature in the reflected light lens provided in an optical path of the reflected light.

Abstract: A limited reflection type photoelectric sensor has a light projecting unit having a light emitting element, a light receiving unit having a light receiving element, and a beam separating member that separates a projected light beam into beams oriented in a plurality of directions and located in an optical path of the projected light beam from the light emitting element. The light projecting unit and the light receiving unit are configured to meet the condition that an intersecting angle between an optical axis of a projected light beam and an optical axis of a receiving light beam is set such that the projected light beam from the light projecting unit is directed to an object detection limited area and the receiving light beam which is reflected light by an object existing in the object detection limited area is received by the light receiving unit.

Abstract: A light transmission path package includes first and sealing surface adjustment members, which are arranged with facing each other by way of a light emitting/receiving element on a lead frame substrate, having a length in a normal direction of the substrate surface from the substrate surface of H2; wherein a relational expression H3<H2<H1 is satisfied where the height H1 is a distance in the normal line direction from the substrate surface to a surface of the light guide facing the substrate surface, and the height H3 is a length in the normal line direction from the substrate surface in the light emitting/receiving element. The sealing resin is filled so as to cover the first and second sealing surface adjustment members and so as not to come in contact with the light transmission path.

Abstract: An optical module has a support board, an optical transmission path, and at least a single optical element having a light receiving function or a light emitting function provided on the support board. A light emission surface of the optical transmission path or a light incidence surface of the optical transmission path is arranged such that the optical element and the optical transmission path are optically coupled to each other, with respect to a light receiving surface or a light emitting surface of the optical element. The optical element is sealed by a sealing agent. A gap is provided between the optical transmission path and the surface of the sealing agent on the light receiving surface or the light emitting surface of the optical element.

Abstract: An optical transmission module has an optical transmission path in which optical transmission is performed between a first circuit board and a second circuit board disposed opposite the first circuit board. The optical transmission path has a folded structure having a bending radius. A circumferential portion drawn by the bending radius is provided substantially perpendicular to board surfaces of the first circuit board and the second circuit board.

Abstract: A transmission unit sequentially outputs a plurality of data signals in a predetermined transmission period during which a one-frame image is transmitted, the predetermined transmission period being defined by a product of a number of the given units and a transmission period of a given unit. Meanwhile, the transmission unit outputs a control signal in the period among the predetermined transmission period that is equivalent to a sum of the transmission time of the given units which does not include the data signals. This period corresponds to the sleep mode period of the transmission unit. The sleep mode period is set such that a ratio of the sleep mode period to the predetermined transmission period is larger than a ratio of a sum of a transmission period of the control signal and a margin period for transmission of the control signal to the predetermined transmission period.

Abstract: A data transmission system is provided with a transmission unit, a receiving unit, transmission paths, and a delay unit. The delay unit is disposed on a transmission path along which a high-speed signal is transmitted, and delays the transmission of the high-speed signal with respect to a low-speed signal. When the high-speed signal is transmitted from a section b2 to c along the transmission path, a delay time of ?t occurs with respect to when the high-speed signal is transmitted from a section a to b1 along the transmission path. In other words, the phase of the high-speed signal transmitted from section b2 to c is shifted with respect to the phase of the high-speed signal transmitted from section a to b1. Consequently, a time interval in which an EMI peak value occurs can be reduced, thereby enabling the probability of an EMI peak value occurring to be reduced.

Abstract: It is possible to reduce a noise component mixed in an analog signal while suppressing increase of power consumption. An amplification unit amplifies the inputted analog signal and converts the amplified signal into a digital signal of a predetermined format for output. The amplification unit includes: an analog circuit unit for processing an analog signal; and a digital circuit unit for processing a digital signal; wherein the circuits are arranged on a substrate. The analog circuit unit includes: an amplification circuit for amplifying the inputted analog signal; and an LPF for cutting off a high frequency component of the amplified analog signal. The digital circuit unit includes: a rectification circuit which rectifies a waveform of the signal whose high-frequency component is cut off; and digital output circuit which converts the waveform-rectified signal into a digital signal of a predetermined format for output.

Abstract: A serializer is equipped with a plurality of input terminals into which a plurality of binary signals are input in parallel, and converts the plurality of input binary signals into serial binary signals and transmits the serial binary signals to an optical transmission module. One input terminal out of the plurality of input terminals is assigned as an input terminal for preventing bit continuation by inserting “1” signals or “0” signals into the serial binary signals so that a predetermined number of bits of the same value may not be inserted continuously. Due to this structure, bit continuation can be prevented even for a signal generating source with no coding function by a simple configuration without increasing cost and size.

Abstract: A light transmission module includes an optical converter for converting an electrical signal to an optical signal; a light transmission path for transmitting the optical signal converted by the optical converter; an electrical transmission path for transmitting an input electrical signal; and a control instructing unit for instructing stop of drive to the optical converter based on a detection of an input electrical signal. When an input electrical signal having a predetermined frequency is detected, the input electrical signal having the predetermined frequency is converted to an optical signal and transmitted in the light transmission path. When input of an electrical signal other than the predetermined frequency is detected, the electrical signal other than the predetermined frequency is transmitted by the electrical transmission path without being converted to an optical signal due to the stop of the drive of the optical converter.

Abstract: A semiconductor laser drive apparatus comprises a bias current setting section (232) which sets a bias current value on the basis of the drive temperature so that the temperature characteristic of the bias current value with respect to the drive temperature may be a linear function having a slope except zero and a drive current setting section (233) for setting the drive current value on the basis of the drive temperature so that the temperature characteristic of the drive current value with respect to the drive temperature may be a function having a slope except zero. The temperature characteristic of the bias current and that of the drive current are functions different from each other. With this, low cost, space-saving, and power-saving of a semiconductor laser are achieved, and a semiconductor laser drive apparatus enabling a good transmission characteristic on the reception side and a high optical output over the whole drive temperature range when driving the semiconductor laser can be provided.

Abstract: A light guide includes a core and a clad made of a material having an index of refraction different from an index of refraction of the core and covering the core, in which at least one of a light incident surface or a light exit surface of the core is arranged while shifted in parallel without changing respective inclined angles so that the inclined surface is divided into a plurality of inclined surfaces parallel in a longitudinal direction (X direction) of the rectangular shape in the orthogonal projection and the plurality of inclined surfaces closer to the light emitting portion are positioned in a direction (Z direction) of moving away from the end face to be in a shape extending in the direction (Z direction) of moving away from the end face in a stepwise manner as a whole.

Abstract: This invention provides an optical transmission module that is of low cost and that can be mounted even in a narrow space. An optical transmission module of the present invention includes a light reception processing section for converting an optical signal transmitted by an optical wiring to an electric signal, a reception side substrate part including an electric wiring for transmitting the electric signal, and a reception side connector section for providing the electric signal to the light reception processing section and the reception side substrate part. The light reception processing section and the reception side connector section are mounted on a same substrate surface of the reception side substrate part, and the reception side substrate part includes a bending portion bent so that the substrate surfaces oppose each other at the back in the normal direction.

Abstract: A transmission device has a light emitting element for converting an electric signal to an optical signal and transmitting the same, and a drive section for outputting the optical signal from the light emitting element and driving the light emitting element by providing the electric signal to the light emitting element. The electric signal provided by the drive section to the light emitting element is a waveform deformed signal having a waveform in which a time required for a fall is longer than a time required for a rise in a binary signal having a signal of high level and a signal of low level.

Abstract: An optical waveguide has a clad, a core surrounded by the clad and having an index of refraction larger than an index of refraction of the clad, an incident end face that makes light enter the core; and an exiting end face that makes light exit from the core. Two side faces of the optical waveguide are formed so as to have an angle change. The two side faces are translationally symmetric with each other, or two side faces excluding a portion of the side faces are translationally symmetric with each other.

Abstract: A light transmission module has a light transmitting unit having a light emitting portion for outputting an optical signal corresponding to a data signal input as an electrical signal, and a first power supply controller for controlling a drive power supply of the light emitting portion, a light transmission path for transmitting the optical signal introduced from the light transmitting unit, a light receiving unit having a light receiving portion for receiving the optical signal output from the light transmission path and outputting an electrical signal corresponding to the optical signal, and a second power supply controller for controlling a drive power supply of the light receiving portion, and at least one electrical transmission path, connecting the light transmitting unit and the light receiving unit, for transmitting a control signal for controlling power supply to the light emitting portion and the light receiving portion to the first power supply controller and the second power supply controller.

Abstract: A light transmission system has a light transmission module having a light transmission path that transmits a data signal as an optical signal, wherein the light transmission module converts the optical signal transmitted through the light transmission path to an electrical signal and outputs the converted optical signal as a binarization signal, an electrical transmission path that outputs a clock signal as a binarization signal, a reception processing unit that performs a reception process on each of the data signal and the clock signal, and a first delay unit that delays a rise start time of the clock signal with respect to a rise start time of the data signal for the binarization signal. A delay amount of the clock signal by the first delay unit is a time less than or equal to a maximum value of a data dependency jitter (DDJ).

Abstract: In a package (5) formed by a supporting portion (5a) for supporting a light emitting portion (7) or a light receiving portion (9) for emitting or receiving an optical signal, and a lid (5b) for covering the supporting portion (5a); the supporting portion (5a) or the lid (5b) includes a light guide mounting surface (22) for supporting at least one end including an incident/exit port of the optical signal in a film light guide (4) for optically coupling with the light emitting portion (7) or the light receiving portion (9) and transmitting the optical signal; and a length (D) in a Z-direction serving as a perpendicular direction with respect to the light guide mounting surface (22) from the light guide mounting surface (22) of the supporting portion (5a) or the lid (5b) to the lid (5b) or the supporting portion (5a) facing the light guide mounting surface (22) is longer than a length (d) in the Z-direction in a region of the film light guide (4) supported by the light guide mounting surface (22).