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LED luminous flux measurement apparatus and method

A technology of light-emitting diodes and measuring devices, applied in measuring devices, photometry, optical radiation measurement, etc., can solve the problems of inconvenient measurement, rise in junction temperature, unstable measurement results, etc., and achieve light weight, low cost, and volume. small effect

Inactive Publication Date: 2009-02-18
HANGZHOU REALOPTIX
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  • Application Information

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Problems solved by technology

The problem it solves is that the LED must be removed from the substrate used in the measurement and installed on the special bracket of the integrating sphere or goniophotometer. The measurement is inconvenient, and the heat generated by the LED when it is working is all accumulated in the integral. The interior of the ball will cause the junction temperature of the LED to rise, making the measurement results unstable, etc., to realize the fast and online measurement of the LED luminous flux

Method used

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  • LED luminous flux measurement apparatus and method

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Embodiment Construction

[0024] exist figure 1 In the schematic diagram of the device shown, the shell 5 is made of metal aluminum or copper, etc., and is used to fix the reflector 2, the integrating rod mirror 6 and the illuminance or irradiance probe (8). The inner hole of the housing 5 has a shape corresponding to the reflector 2 and the integrator rod mirror 6, the part corresponding to the reflector 2 is an inner cone, and the part corresponding to the integrator rod mirror 6 is a regular polygon. The outer shape of the shell 5 can be freely selected according to the needs of use. The size of the inner hole is slightly larger than that of the integrating rod mirror, and the support ring 4 can be sandwiched between the inner hole and the integrating rod mirror 6, so that an air gap is formed between the integrating rod mirror 6 and the housing 5, ensuring that the light is fully generated on the side surface 16 of the rod mirror. reflection. The bottom edge of the triangular support ring 4 is in...

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Abstract

The invention relates to a measuring device and a measuring method using optoelectronic devices to measure the luminous flux, radiant flux or radiant power of light-emitting diodes and other solid light sources so as to solve the problems that the existing device and method are of low accuracy and can not achieve on-line measurement. The measuring device mainly comprises an illumination or irradiance measurement probe (8), a photocurrent measurement display unit (10), a reflector (2), an integral rod lens (6), a support ring (4) and an outer shell (5). The measuring method comprises the following steps: the reflector (2) is used to collimate the light emitted by a light-emitting diode (1) in a hemisphere, and then the light is sent to the integral rod lens (6) and homogenized; the illumination or irradiance of the exit end (15) of the integral rod lens (6) is measured; and the measured result is multiplied by the area of the exit end (15) of the integral rod lens (6) so as to obtain the luminous flux or radiant power of the light-emitting diode (1). The measuring device and the measuring method can realize absolute measurement and has the advantages of small size, low cost and good long-term stability; the invention can be used for fast, real-time and online measurement of various light-emitting diodes from the ultraviolet to the near infrared full band.

Description

technical field [0001] The invention relates to a device and method for measuring luminous flux, radiant flux or radiant power of a solid light source such as a light-emitting diode (hereinafter referred to as LED) by using a photoelectric device. In particular, it relates to a luminous flux and radiation flux measuring device and method composed of a photometer or irradiance meter probe and a photocurrent measurement, collection and display unit. Background technique [0002] Luminous flux, radiant power or radiant flux is one of the most important parameters to characterize the luminous characteristics of a light source. There are usually two ways to measure the luminous flux: one is to use a standard light source with known luminous flux in the integrating sphere to compare and measure with the measured light source, so as to determine the luminous flux of the measured light source; the other method is to measure the measured light flux with a distributed photometer The ...

Claims

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Application Information

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IPC IPC(8): G01M11/02G01J1/42G01R31/44
CPCG01J1/42G01J2001/4252
Inventor 郑晓东秦文红
Owner HANGZHOU REALOPTIX
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