Abstract:
A method for testing light-emitting devices in a batch-wise, associated with a system for the same purpose, comprises the steps of: preparing the light-emitting devices on a moving carrier unit in a manner of aligning a predetermined longitudinal direction of the light-emitting devices with a predetermined transportation direction of the moving carrier unit, each of the light-emitting devices further having plural light-emitting elements; transporting orderly the light-emitting devices to pass a test area on a base of the system, in which the base energizes only the light-emitting elements within the test area; and, a solar cell module detecting continuously the energized light-emitting elements within the test area and further forming signals with respect to photo energy received in the test area.
Abstract:
A test system and method are provided for testing in parallel radiant output of multiple light emitting devices. Generally, the method involves: (i) providing a system having a master, calibrated power meter (CPM), a source transfer standard (STS), and multiple secondary, test site power meters (TSPMs); (ii) determining a relationship between electrical power supplied to the STS and a radiant output therefrom as measured by the CPM; (iii) calibrating the TSPMs using the STS and the relationship between the power supplied to the STS and the radiant output therefrom as determined by the CPM; and (iv) positioning the devices undergoing test on a fixture of the test system and positioning the fixture relative to the TSPMs to test radiant outputs of the devices. Preferably, the TSPMs are calibrated by exposing each to the STS at a known power, determining a difference between the radiant output measured by the CPM and TSPM, using this difference as an offset that is added to the a signal from the TSPM to provide a corrected radiant output for the device under test. Other embodiments are also disclosed.
Abstract:
An apparatus for testing transmission of a lens includes a light source, a focusing device, an integrating sphere, a moveable carrier, a detector, and a processor. Light, in a specific wavelength range, is emitted from the light source. The focusing device is configured for collimating and focusing the light to transmit the light onto the lens being tested. The integrating sphere is configured for receiving light transmitted through the lens. The moveable carrier is configured for facilitating a relative movement between the lens and the integrating sphere. The detector includes a light sensor configured for detecting a light intensity received by the integrating sphere and transforming the light intensity into a comparing signal for comparison. The processor is configured for comparing a signal of the intensity of the light transmitted to the lens with the comparing signal to obtain a transmission efficiency/percentage of the lens.
Abstract:
A mirror is provided with a light source window and an illumination window each establishing communicative connection between an inner face side and an outer side of a hemispherical unit. The light source window is an opening to which a light source OBJ to be measured is attached mainly. The illumination window is an opening for guiding a flux of light from a correcting light source used for measurement of self-absorption toward the inner face of the hemispherical unit. A self-absorption correcting coefficient of the light source OBJ is calculated based on an illuminance by a correcting flux of light in a case where the light source to be measured OBJ in a non-light emitting state is attached to the light source window and an illuminance by a correcting flux of light in a case where a calibration mirror is attached to the light source window.
Abstract:
The present invention describes a bolometric device with receiving cavity for measuring a beam of high frequency microwaves, comprising a hollow body (1) with receiving cavity (50) having an opening (2) for the entrance of said beam of high frequency microwaves in said receiving cavity (50), a diverging mirror (3) located in the lower part of said cavity (50) for reflecting said beam of microwaves on an absorbent coating material (4) applied on the internal surface (5) of the hollow body (1), a cooling circuit (7) for transferring the thermal energy accumulated on the absorbent coating material (4) and a circuit (6) for measuring the power of the beam of high frequency microwaves entering the hollow body (1). Said absorbent coating material (4) consists of boron carbide. In addition a procedure is described for coating with an absorbent material the internal surface (5) of a hollow body (1) being part of the aforementioned device for measuring a beam of high frequency microwaves (FIG. 1).
Abstract:
A correction LED is provided to illuminate a light receiving sensor array, and a calculation controlling circuit calculates correction values at the respective illuminance levels based on sensor output levels expected at the respective illuminance levels and actual sensor output levels while successively turning the correction LED on at a plurality of illuminance levels whose illuminance ratios are at least known, and corrects a sensor output level by the corresponding correction value to obtain a measurement output at the time of an actual measurement. The discontinuity of an input/output characteristic resulting from the switching of gains of an amplifier for amplifying a photocurrent and the non-linearity caused by the saturation of the photoelectrically converting characteristic of the optical sensor and the exponential characteristics of the optical sensor and the amplifier can be corrected without employing a large-scale construction such as a bench. The non-linearity can be highly precisely and efficiently corrected in a measuring apparatus realized as a spectral luminometer or a spectral colorimeter without requiring a special facility.
Abstract:
A quick attachment device for use in the repeated testing of diode light sources (30) includes a quick attachment module (10) having a fixed location with respect to a testing position (150) for the diodes (30), and a mounting assembly (20) on which each diode (30) is mounted during testing. The quick attachment module (10) includes a quick disconnect fastener and two locating pins (120a and 120b) for securing the mounting assembly (20) for testing, where the two locating pins (120a and 120b) have a locational transition fit connection with the mounting assembly (20). The mounting assembly (20) may further include a thermal-electric cooling device (260) for cooling the diode light sources (30) during testing.
Abstract:
A correction LED is provided to illuminate a light receiving sensor array, and a calculation controlling circuit calculates correction values at the respective illuminance levels based on sensor output levels expected at the respective illuminance levels and actual sensor output levels while successively turning the correction LED on at a plurality of illuminance levels whose illuminance ratios are at least known, and corrects a sensor output level by the corresponding correction value to obtain a measurement output at the time of an actual measurement. The discontinuity of an input/output characteristic resulting from the switching of gains of an amplifier for amplifying a photocurrent and the non-linearity caused by the saturation of the photoelectrically converting characteristic of the optical sensor and the exponential characteristics of the optical sensor and the amplifier can be corrected without employing a large-scale construction such as a bench. The non-linearity can be highly precisely and efficiently corrected in a measuring apparatus realized as a spectral luminometer or a spectral calorimeter without requiring a special facility.
Abstract:
A spectrophotometric system includes a zoom lens assembly that is mounted for axial translation relative to an integrating sphere. The zoom lens assembly includes first and second focusing lens mounted to an axially movable lens carrier. The lens carrier is positioned intermediate first and second sets of mirrors for reflecting/directing SCE and SCI beams toward fiber ports. A reference beam is also emitted from the integrating sphere and transmitted to a processor, thereby resulting in simultaneous tri-beam measurements. The disclosed spectrophotometric systems may also include an aperture plate detection assembly and/or a sample holder assembly that incorporates a dampening gas spring. The aperture plate detection system includes a detection disk that may include a plurality of pre-positioned sensors that interact with an activating ridge formed on the aperture plate for identification thereof.
Abstract:
Object: provide an accurate monitor of light of even intensity light. Construction: A beam splitter (4) being fixed on a base (1) in the path of a main beam (2) of a light system, a reflecting mirror (5) being fixed on a side of the beam splitter (4), an inlet 6a of an integrating sphere (6) is provided at an opposite side of the beam splitter (4), and a light sensor (8) is provided at a reflecting surface of the integrating sphere (6).