Abstract:
A device for measuring the output of an LED with a detector under different distance conditions without requiring the movement of either the LED or the detector. An exemplary embodiment of the present invention implements the testing conditions specified in CIE 127 allowing the determination of Averaged LED Intensity at the specified distances of 100 mm and 316 mm while keeping the physical distance between the LED and the detector fixed at the shorter distance of 100 mm. The exemplary embodiment comprises an optical element that can be selectively inserted into the optical path between the LED and the detector to make the separation appear to be the longer of the two distances. The optical element comprises a lens assembly and a detector aperture that creates a virtual image of the detector aperture at the longer of the two distances. The detector aperture is dimensioned so that the virtual image of the detector aperture has the area required by the standard.
Abstract:
An optical pathway of a scanning spectral radiometer for a continuous monitoring of spectral radiation employs a diffuser having an upper source directed surface and a lower sensor directed surface for diffusing radiation incident on the upper surface and transmitting the diffused radiation. An occulting ring laterally surrounds the diffuser. A filter receives the diffused radiation from the light diffuser and passes a predetermined wavelength range. A photodetector is positioned to receive the filtered radiation. The photodetector is positioned at one end of an optical path, with a diffuser being positioned at the other end of the optical path. A collimator is provided between the diffuser and the photodetector, with the optical path extending through the collimator.
Abstract:
A spot shape detection apparatus for detecting the spot shape of a laser beam oscillated from a laser oscillator includes: a focusing leans for focusing the laser beam oscillated by the oscillator; a rotary body (mirror holder) in which a plurality of mirrors for reflecting the laser beam having passed through the focusing lens are disposed on concentric circles; a drive source (motor) for rotating the rotary body at a predetermined period; a beam splitter for branching return beams of the laser beam reflected by the plurality of mirrors of the rotary body; an imaging unit which is disposed in a direction in which the return beams are branched by the beam splitter and which images spot shapes of the return beams; and a display unit for displaying images obtained by imaging by the imaging unit, in relation with the plurality of mirrors.
Abstract:
Various embodiments include systems and methods to provide selectable variable gain to signals in measurements using incident radiation. The selectable variable gain may be used to normalize signals modulated in measurements using incident radiation. The selectable variable gain may be attained using a number of different techniques or various combinations of these techniques. These techniques may include modulating a modulator having modulating elements in which at least one modulating element acts on incident radiation differently from another modulating element of the modulator, modulating the use of electronic components in electronic circuitry of a detector, modulating a source of radiation or combinations thereof. Additional apparatus, systems, and methods are disclosed.
Abstract:
An apparatus for optically measuring samples, including a radiation source configured to form an excitation beam in an excitation channel, a detector configured to detect an emission beam in an emission channel and a filter configured to be located, in an excitation position, in the excitation channel, and in an emission position, in the emission channel. The apparatus further includes a first filter storage comprising a first set of filter storage positions, a second filter storage comprising a second set of filter storage positions, and a filter transfer mechanism configured to move the filter between the excitation position, the emission position, the first set of filter storage positions and the second set of filter storage positions.
Abstract:
A high-speed optical measurement apparatus includes an objective lens unit, an optical path unit, a control circuit unit, a measurement sensor, an eyepiece unit, and a measurement sensor connection. The objective lens unit adjusts the magnitude of the overall light of the individual locations of the object or the set of multiple objects, and allows the light to make its entrance. The optical path unit changes the path of the incident light. The control circuit unit outputs a control signal which is used to change a direction of the light by controlling the optical path unit. The measurement sensor measures the incident light. The eyepiece unit conforms the light to the size and location of the measurement sensor. The measurement sensor connection fastens the measurement sensor so that the light incoming through the eyepiece unit is aligned with the measurement sensor.
Abstract:
An apparatus for measuring light properties includes a housing defining a light input port; as well as a first light detector; a second light detector; and a coupling element. The first light detector is a single channel light detector or a multiple channel light detector. The second light detector is a multiple channel light detector. The coupling element is configured and arranged to selectively couple light incident from the light input port to one of the first light detector and the second light detector. As an alternative, a beam splitting element can be used instead of the coupling element. The beam splitting element receives light from the light input port and then splits the light and delivers a portion of the light to the first light detector and a portion of the light to the second light detector.
Abstract:
Provided are an illuminating optical system which illuminates a sample, an illumination-side pupil modulating device which is arranged on a side of the illuminating optical system, an illumination-side turret which holds the illumination-side pupil modulating device, an illumination-side-turret revolving mechanism which revolves the illumination-side turret to move the illumination-side pupil modulating device along an orbital circumference on a plane perpendicular to an optical axis, a relaying optical system which relays a pupil of an objective lens; an imaging-side pupil modulating device which is arranged on a side of the relaying optical system, an imaging-side turret which holds the imaging-side pupil modulating device, and an imaging-side-turret revolving mechanism which revolves the imaging-side turret to move the imaging-side pupil modulating device along the orbital circumference on a plane perpendicular to the optical axis.
Abstract:
A device for measuring the output of an LED with a detector under different distance conditions without requiring the movement of either the LED or the detector. An exemplary embodiment of the present invention implements the testing conditions specified in CIE 127 allowing the determination of Averaged LED Intensity at the specified distances of 100 mm and 316 mm while keeping the physical distance between the LED and the detector fixed at the shorter distance of 100 mm. The exemplary embodiment comprises an optical element that can be selectively inserted into the optical path between the LED and the detector to make the separation appear to be the longer of the two distances. The optical element comprises a lens assembly and a detector aperture that creates a virtual image of the detector aperture at the longer of the two distances. The detector aperture is dimensioned so that the virtual image of the detector aperture has the area required by the standard.
Abstract:
In an embodiment according to the present invention, a coronagraph for detecting reflective bodies external to a light source is provided. A first mirror for directing a beam of light onto an occulting mask is adjusted based on a data from a fiber optic sensor or a second sensor. An occulting mask for separating the beam into a first and second portion directs the first portion onto a fiber optic sensor and the second portion onto a Lyot stop. The occulting mask is adjustable based on data from the second sensor. The Lyot stop separates the second portion of the beam into a third and fourth portion. The Lyot stop also directs the third portion of the beam onto the second sensor and the fourth portion of the beam onto a camera for detecting one or more reflective bodies external to a light source.