Abstract: A lens unit includes an MF ring that operates a focus lens group (F group) of a lens optical system, and a CPU that controls the operation of the MF ring and the working of the F group. The CPU sets two or more sections in a working range of the F group and an operation sensitivity of the MF ring for each section, and works the F group according to the setting.

Abstract: An imaging lens included in an imaging device includes a negative first lens, a positive second lens having a meniscus shape, an aperture stop, a positive third lens, and a positive cemented lens composed of a positive fourth lens and a negative fifth lens, and satisfies a specific formula relating to the fourth and fifth lenses.

Abstract: An imaging lens included in an imaging device includes a negative first lens, a positive second lens having a meniscus shape, an aperture stop, a positive third lens, and a positive cemented lens composed of a positive fourth lens and a negative fifth lens, and satisfies a specific formula relating to the second and third lenses.

Abstract: A lens system for generating a set of still images, which includes: a lens optical system; a memory that stores setting information regarding imaging conditions; and a processor, in which the processor executes repetitive driving processing of causing the lens optical system to repeat driving between imaging and stopping and holding during imaging based on the setting information, and continuous stopping processing of causing the lens optical system to continue stopping and holding during a plurality of times of imaging based on the setting information.

Abstract: A reciprocal lattice image, which represents a lattice point group of a reciprocal lattice, is generated by performing a two-dimensional Fourier transform on a target image. In addition, a target lattice, in which an arrangement of the lattice point group approximates an arrangement of a target focal spot group, is estimated with reference to a lattice vector of the reciprocal lattice. Then, lattice coordinates of a lattice point, which is closest to a target focal spot, of the target lattice are assigned to each corresponding target focal spot, thereby pairing the target focal spot with a reference focal spot.

Abstract: In an image forming apparatus (1), an excitation light source (10) irradiates an object with excitation light for a first fluorescence substance and excitation light for a second fluorescence substance, a notch filter (20) transmits fluorescence in a wavelength range specific to each fluorescence substance among return light from the object, an imaging unit (30) separately captures images of the fluorescence in respective wavelength ranges, and an image processing unit (40) superimposes these images.

Abstract: An optical system includes: a first lens group; and a rear group that has a plurality of lens groups, the first lens group and the rear group being arranged in order from an object side, wherein a spacing between lens groups which are adjacent to each other changes during focusing, the rear group includes a first focus group which has a negative refractive power and moves during focusing, and a second focus group which has a negative refractive power and moves during focusing, at least one lens group P having a positive refractive power is provided between the first focus group and the second focus group, the lens group P includes a subgroup PN having a negative refractive power at a position closest to the object side, and predetermined conditional formulae are satisfied. An imaging apparatus includes: the optical system, and an image sensor.

Abstract: An optical communication device includes an adjustment device and a light receiving unit. The adjustment device includes a wedge prism, an actuator, a detection unit, and a control unit, and the control unit controls the actuator to reduce a difference between a result of detection by the detection unit and a reference.

Abstract: To achieve this object, there is provided a laser beam dimming device including a beam splitter in which reflected light is used as observation light, wherein the beam splitter reflects 10% or less of incident light, the beam splitter is disposed such that an incident angle of the incident light at a position of an optical axis is 45° with an X axis as a rotation axis when arbitrary orthogonal coordinate axes whose origin on a plane perpendicular to the optical axis is an optical axis are an X axis and a Y axis, and a cross-sectional shape of the beam splitter on a plane determined by the incident light and the reflected light of the beam splitter is a wedge shape in which an incident light side of the beam splitter is thin and a reflected light side of the beam splitter is thick.

Abstract: An actuator for optical axis adjustment, which allows a wedge prism to be mounted thereon and is rotationally driven by a voice coil motor, has a bearing structure in which rolling members are sandwiched between a groove on a movable unit and a groove on a fixed unit that face mutually radially.

Abstract: A transmission optical system and a reception optical system of an optical wireless communication apparatus are independent of each other. Optical paths of a signal light from an antenna for both transmission and reception are parallel to each other. An integrated fast steering mirror (FSM) is arranged to span both of the optical paths.

Abstract: In order to solve the problem described above, an optical system according to the present invention includes, in order from the object side, a front group, a stop, and a rear group, in which the front group has a lens A having a positive refractive power on the most object side, and the rear group has a lens B having a negative refractive power on the most image side, an object side surface of the lens B has a concave surface on the object side, and the optical system satisfies the predetermined conditional formulas.

Abstract: In order to solve the above problem, an optical system according to the present invention includes a front group, a diaphragm, and a rear group in order from an object side, in which the optical system includes a lens A having positive refractive power and being closest to the object side in the front group and a lens B having negative refractive power and being closest to an image side in the rear group, an object-side surface of the lens B has a concave surface with respect to the object side, a number of lenses having refractive power and included in the front group and the rear group is eight or less in total, and the optical system satisfies a predetermined condition.

Abstract: A lens system includes: a lens optical system; at least one operation member that receives at least an actuation operation that is an operation for changing a state of the lens optical system; at least one memory; and at least one processor, in which the at least one processor controls the lens optical system such that operation sensitivity that is a ratio of an amount of change in the state of the lens optical system to an operation amount of the actuation operation input to the at least one operation member changes according to a difference between a storage state that is a state of the lens optical system and is stored in the at least one memory in advance and a current state that is a current state of the lens optical system.

Abstract: A signal light transmission member includes an AR coated lens, a light transmission part, and an optical fiber. The refractive index of the light transmission part has a specific relationship with the refractive index of a core material of the optical fiber. An anti-reflective coating is formed at an interface portion between the lens of the AR coated lens and the light transmission part.

Abstract: A lens control device according to an aspect of the present invention controls a lens in order to image a subject and includes at least one processor configured to perform a calculation process of calculating a distance between the lens or a camera, to which the lens is attached, and the subject on a basis of a position of the lens or the camera and a position of the subject and a remote control process of remotely controlling the lens on a basis of the distance.

Abstract: A gas detection apparatus includes a spectroscopic apparatus and a gas supply pipe, the spectroscopic apparatus including a light source of near-infrared light having a specified full width at half maximum in the wavelength spectrum, an optical cavity having a pair of reflectors facing each other and having a specific effective reflectivity, and a photodetector that detects intensity of emission light from the optical cavity.

Abstract: A gas detection device includes a gas detection system configured to image while irradiating, in a dot array shape, infrared light having an absorption wavelength of a gas from a light source, and generates, with a CPU, information on an emphasis image of an image of the gas from image information when irradiating and image information when not irradiating, and a display unit.

Abstract: The optical system includes a plurality of lens groups in which an interval between adjacent lens groups changes when focusing, and an aperture stop, and when intervals between an exit pupil of an on-axis ray by the aperture stop and an image plane in an infinite-distance object focusing state, a first short-distance object focusing state in which an imaging magnification is ?1, and a second short-distance object focusing state in which an imaging magnification is ?2 are Pinf, P1, and P2, respectively, the optical system satisfies predetermined conditions. An imaging apparatus includes the optical system and an image sensor.

Abstract: A zoom lens includes a lens group having positive refractive power, a middle group having negative refractive power as a whole, a lens group having positive refractive power, a lens group having positive refractive power, a lens group having negative refractive power, and a rear group all of which are disposed in order from the object side to the image plane side, and has a specific optical characteristic expressed by a specific expression.