SU957622A1 - Device for measuring ratio of brightness of phosphor to reference phosphor brightness - Google Patents

Abstract

DEVICE FOR MEASURING OTNSYAYAEYIYA brightness of phosphors and a reference phosphor consisting of a housing / placed thereon and optically coupled excitation source of the phosphor, the glass N hydrochloric filter plate made movable, rotary disk cuvette for phosphors and photodetector radiation, electrical associated with a measuring device, characterized in that, in order to reduce the measurement time, the glass plate filter is adapted to move in two fixed position : Between the source of excitation and between a phosphor and a phosphor of radiation and a photodetector, and a measurement device provided with a sensitivity adjusting circuit and compensation, wherein the photodetector output is connected to the instrument via izmeritelynm compensation scheme.

Description

The invention relates to the field of measuring the chemical and physical properties of substances.

Known photometric device for comparing the brightness of the luminescence of powders of luminescent materials C1]. The disadvantages of this device are the low speed and accuracy, because to compare the brightness of the phosphors with the simultaneous excitation of two phosphors it uses a diaphragm.

The closest technical solution is a device for measuring the brightness ratio of a candle phosphor and a reference phosphor, consisting of a housing placed on it and optically coupled phosphor excitation source, a glass filter plate, configured to move the rotation of the disk with cuvettes for phosphors and a photodetector of radiation electrically connected with measuring device [2}. ^A

The disadvantage of this device is the significant duration of the measurement.

The aim of the invention is to reduce the measurement time.

This is achieved by the fact that in the device for measuring the ratio of the luminosity of the luminophore and the reference luminophore, consisting of a housing placed on it and optically coupled excitation source of the phosphor, a glass filter plate made with the possibility of movement, a rotary disk with cuvettes for phosphors and a photodetector of radiation, electrically associated with the measuring device, the glass filter plate is made with the ability to move in two fixed positions: between the excitation source and the phosphor set and between a phosphor and a radiation fo.topriemnikom and measuring device is provided with a sensitivity adjusting circuit and compensation, the output of the photodetector is connected to the measuring device via a compensation circuit.

The drawing shows a schematic diagram of this device.

The device comprises a photodetector 1, a glass filter plate 2, a phosphor excitation source 3, a housing 4, a rotary disk 5 with cuvettes for phosphors, an operational amplifier 6, a digital measuring device 7, a sensitivity controller 8, resistors 9, 10, 11 and a source 12 nutrition.

First, a glass filter plate 2 is placed in a position between the excitation source 3 and the phosphor luminous. The glass plate is selected so that it does not transmit light that excites the luminophore. In this position, using a measuring device 7, the light flux of the excitation source reflected from the surface of the phosphor is recorded, attenuated by the filter and amplified by the operational amplifier 6. A compensation circuit consisting of a power source 12 and resistors 9, 10, 11 by voltage regulation on one of the The inputs of the operational amplifier compensate the reflected light until a zero reading is obtained on the measuring device.

Then the glass plate is placed in the position between the phosphor and the photodetector of radiation and the total flux of luminescence and reflected light is recorded, just as attenuated by the glass plate, as in the first measurement. The compensation circuit automatically performs the operation of subtracting the reflected light from the total flux. On the scale of the measuring device 7, the sensitivity regulator 8 sets a reading equal to 100 for the reference phosphor. Taking me 40 readings for the test batch will automatically correspond to the ratio of the brightness of the phosphor and the reference phosphor in percent.

The use of this device allows to increase the speed in comparison with the known one, since there is no need to periodically measure the filter attenuation coefficient, additional calculations, and it becomes possible to directly register the ratio: -the brightness of the luminescence in percent on the scale of the measuring instrument / s.

Claims (1)

DEVICE FOR MEASURING THE RELATIONSHIP OF BRIGHTNESS OF LUMINOPHOR LIGHT AND REFERENCE LUMINOPHOR, consisting of a housing placed on it and optically coupled phosphor excitation source, a glass filter plate made with the possibility of movement, a rotary disk with cuvettes for phosphors and a photodetector of radiation, and an electric radiation detector with a measuring device, characterized in that, in order to reduce the measurement time, the glass filter plate is made with the possibility of moving to two fixed positions: dy excitation source and a phosphor, and between the phosphor and the emission light detector, and the measuring device is provided with a sensitivity adjusting circuit and compensation, wherein the photodetector output is connected to the unit through circuit izmeritelynm <d compensation. eat m