Abstract: An illuminator includes: a light emitter including a light-emitting diode; a temperature sensor configured to detect a current temperature of the light emitter; and an illumination controller configured to adjust a drive voltage being supplied to the light emitter in accordance with the current temperature. The illumination controller includes a reference temperature storage in which a reference temperature is stored in advance and is configured to adjust the drive voltage by detecting the current temperature from the temperature sensor on a constant time cycle and comparing the current temperature with the reference temperature.

Abstract: There is provided a measuring device (dial gauge) capable of performing measurement with a desired measuring force regardless of the posture of the measuring device. A dial gauge in an exemplary embodiment of the present invention includes a measuring force adjustment unit provided to a body case and capable of moving and being positioned and fixed in a direction substantially parallel to a moving direction of a spindle. A biasing means has one end directly or indirectly engaged with the spindle and the other end directly or indirectly engaged with the measuring force adjustment unit, and biases the spindle toward a tip end. The measuring force adjustment unit includes an external thread portion and a connection supporting member having one end screwed with the external thread portion and the other end coupled to the biasing means.

Abstract: An automatic measuring device includes a micrometer including a spindle that moves forward and backward to be brought into contact with or away from a workpiece and a displacement detector unit that detects displacement of the spindle, and an automatic operation unit that automates the forward and backward movement of the spindle by power. The automatic operation unit performs a first forward-movement step of moving the spindle forward to bring the spindle into contact with the workpiece, and a contact determination step of determining the contact between the spindle and the workpiece in the first forward-movement step. In the contact determination step, the spindle is determined to be in contact with the workpiece when a change in a position of the spindle detected by the displacement detector unit in the first forward-movement step becomes equal to or less than a predetermined contact determination threshold.

Abstract: A measurement apparatus includes a laser apparatus, a branch that branches a frequency-modulated laser beam into a reference light and a measurement light, a beat signal generator that generates a beat signal by mixing the reference light and a reflected light that is the measurement light radiated onto an object to be measured, a first analyzer that analyses a first signal component corresponding to a difference in a propagation distance between the reference light and the measurement light on the basis of the beat signal, a second analyzer that analyses a second signal component corresponding to a cavity frequency of an optical cavity on the basis of the beat signal, and calculation circuitry that calculates the difference in the propagation distance between the reference light and the measurement light.

Abstract: A measurement apparatus including: a laser that outputs a frequency-modulated laser beam; a branch that splits the frequency-modulated laser beam into a reference light and a measurement light; a beat signal generator that generates a beat signal by mixing the reference light and a reflected light that is reflected by radiating the measurement light onto an object to be measured; a frequency analyzer that frequency-analyzes the beat signal; a storage that stores a reference frequency signal which is a frequency signal obtained by converting a reference signal output by the beat signal generator in a state without the object to be measured; and calculation circuitry that calculates a difference between propagation distances of the reference light and the measurement light.

Abstract: A measurement apparatus includes a laser apparatus, a branching part that branches a frequency-modulated laser beam output by the laser apparatus into a reference light and a measurement light; a beat signal generation part that generates a beat signal by mixing a reflected light and the reference light, a conversion part that converts the beat signal into a digital signal at a first sampling rate and frequency-analyses it, an extraction part that extracts a signal component corresponding to a cavity frequency from the frequency-modulated laser beam, a digital filter that digitally filters the extracted signal component at a second sampling rate; and a calculation part that calculates a difference in a propagation distance between the reference light and the measurement light.

Abstract: A system is provided for programming workpiece feature inspection operations for a coordinate measuring machine. The system includes a user interface with a simulation portion (e.g., including a 3D view of a workpiece) and an editing user interface portion (e.g., including an editable plan representation of a current workpiece feature inspection plan). Transparency operations are performed including automatically identifying as a target feature a workpiece feature in the 3D view that corresponds to a workpiece feature or inspection operation representation in the editable plan representation that is indicated by a current feature-directed operation (e.g., a selection operation for selecting a workpiece feature or inspection operation in the editable plan representation). An occluding workpiece feature that would otherwise be occluding at least a portion of the target feature in the 3D view is then automatically rendered as at least partially transparent in the 3D view.

Abstract: A grating part includes a first transparent substrate having an optical grating on a surface thereof, a second transparent substrate having an optical grating on a surface thereof, and a spacer positioned between the first transparent substrate and the second transparent substrate, the spacer bonding the first transparent substrate and the second transparent substrate.

Abstract: A digital micrometer includes a main-body frame, a spindle, a thimble part, and a displacement detector that detects displacement of the spindle. The main-body frame includes a U-shaped frame part, and a spindle holding part provided on the other end side of the U-shaped frame part and having a length in a direction away from an anvil. The spindle is held by a spindle holding part, provided to be movable forward and backward in an axial direction with respect to the anvil, and includes a contactor on one end face. The main-body frame and the spindle are formed of a non-magnetic material.

Abstract: Facilitate the work of setting the part program used in the measuring device for each object to be measured. A measurement control apparatus of the present invention includes a code reader that reads a code containing at least a part program identification information, and a measurement information providing unit that, when the code is read by the code reader, sends a start command of a part program corresponding to the part program identification information recorded in the code to a measuring device, and causes the measuring device to execute processing according to the part program prepared in advance.

Abstract: A scale includes a base material, scale patterns arranged at a predetermined periodicity on a main surface of the base material, and a fluorine film that covers the scale patterns and is at least partly a monomolecular fluorine compound.

Abstract: A laser processing machine includes: a variable focal length optical system in which a focus position is periodically changed in response to a drive signal to be inputted; a position-detection light source configured to emit a detection light onto a workpiece through the variable focal length optical system; a light detector configured to receive the detection light reflected on the workpiece and output a light detection signal; a signal processor configured to output a synchronization pulse signal in synchronization with the focus timing when the detection light is focused on the surface of the workpiece in accordance with the inputted light detection signal; and a laser oscillator configured to oscillate a pulse laser beam in accordance with the inputted synchronization pulse signal to radiate the pulse laser beam on the workpiece through the variable focal length optical system.

Abstract: There is provided an inside-diameter measuring unit capable of automating inside-diameter measurement and a control method for automatic inside-diameter measurement. An inside-diameter measuring part is supported by a support frame part via a floating joint part. The floating joint part includes a rotation-allowing mechanism part and a translation-allowing mechanism part. A measuring head part of the inside-diameter measuring part is inserted into a hole by a robot arm part. The inside-diameter measuring part adjusts its position and posture autonomously by the reaction force when a contact point pushes against the inner wall of the hole to align the axis of the inside-diameter measuring part with the axis of the hole. An electric inside-diameter measuring unit can automatically measure the inside diameter of a hole.

Abstract: A measurement method of a surface shape and a surface shape measurement device uses an interferometer optical head that acquires an interference fringe image generated by a light path difference between the reference light and the measurement light, acquires N interference fringe images by scanning from a start point to an end point in the Z-axis direction, and measures the surface shape of the measurement target surface based on the interference fringe images. For a common position in the N interference fringe images, regarding an interference signal including values of N points that indicates a change in the interference light intensity along the Z-axis direction, a phase of an interference fringe produced by the light of a predetermined analysis wavelength is determined, and the relative position in the Z-axis direction of the measurement target surface within the range of the analysis wavelength is determined based on the phase.

Abstract: There is provided a housing unit having an immersion detection function, as a housing of an electronic device requiring waterproofing. A housing unit includes a casing liquid-tightly defining an internal housing space and housing an internal device in the housing space, and an immersion detector that detects whether liquid leak into the housing space of the casing. The casing includes a sealing means for waterproofing a joint, an entryway, or an opening. The immersion detector includes an electrolyte salt and a continuity detector that detects a change in conductivity when the liquid comes into contact with the electrolyte salt. The electrolyte salt is arranged inside the casing and further inside the casing than the sealing means.