CN201555659U

CN201555659U - Mesopic vision photometer

Info

Publication number: CN201555659U
Application number: CN2009201974674U
Authority: CN
Inventors: 潘建根
Original assignee: Hangzhou Everfine Photo E Info Co Ltd
Priority date: 2009-09-29
Filing date: 2009-09-29
Publication date: 2010-08-18
Anticipated expiration: 2019-09-29

Abstract

The utility model discloses a mesopic vision photometer, comprising a spectrograph, a photopic vision luminosity probe and a scotopic vision luminosity probe which are electronically connected with a microelectronic processing unit simultaneously. By only needing to be measured for one time, the mesopic vision photometer can obtain the mesopic vision luminosity quantity, has convenient use, and is applicable to any mesopic vision luminosity model in the prior art. The mesopic vision photometer can use a spectrum correction method, thus greatly reducing the mismatching error of the spectrum of the luminosity probes and being capable of obtaining the quantity value of the mesopic vision luminosity quantity.

Description

A kind of mesopic vision photometer

[technical field]

The utility model belongs to the optical radiation measurement field, is specifically related to a kind of mesopic vision photometer.

[background technology]

When the brightness of human eye light stimulus at about 10cd/m ²When above, mainly the vision that is obtained by the human eye cones claims photopic vision or cones's vision, and the photopic vision luminous efficiency function V (λ) of CIE regulation is basis and the foundation that current photometric is learned calculating, measurement and illumination Design.The brightness of light stimulus is about 0.01cd/m ²Below, promptly the vision that is mainly obtained by rod cells under the dark adatpation situation claims noctovision or rod cells vision, CIE has also stipulated noctovision luminous efficiency function V ' (λ) in nineteen fifty-one, and noctovision luminous efficiency function curve moves to the shortwave direction with respect to photopic vision luminous efficiency function curve.When brightness of illumination was between photopic vision and noctovision, promptly brightness was at 0.01cd/m ²～10cd/m ²Between the time, such as night-road illumination and traffic lighting etc., belong to the mesopic vision state, the cones of human eye and rod cells are simultaneously movable and interact in this state.The luminous efficiency function V of mesopic vision _m(λ) relevant with concrete illumination level, under mesopic vision conditions such as night illumination, the luminous efficiency function is offset with respect to photopic vision luminous efficiency function, as all using the photopic vision photometric standard, then can in photometric measurement calculating and illumination Design, produce inappropriate or even wrong result.

[utility model content]

In order to overcome defective of the prior art, the utility model aims to provide a kind of easy to use and mesopic vision photometer that measuring accuracy is higher and measures the method for mesopic vision.

In order to achieve the above object, the utility model has adopted following technical proposal:

A kind of mesopic vision photometer, it is characterized in that: comprise a spectrometer that is used for the measure spectrum distribute power, the photopic vision luminosity probe that the photopic vision luminous efficiency function V (λ) of spectral response sensitivity and CIE regulation is complementary, the noctovision luminosity probe that the noctovision luminous efficiency function V ' of spectral response sensitivity and CIE regulation (λ) is complementary, described spectrometer, photopic vision luminosity probe and noctovision luminosity probe all are electrically connected with microelectronic processing unit.It is that digital signal conversion circuit is electrically connected with described microelectronic processing unit that photopic vision luminosity probe and noctovision luminosity probe can be used for analog signal conversion by one respectively.

Above-mentioned spectrometer is by the rapid spectrometer of detector array as photoelectric conversion unit.

The mechanical scanning type spectrometer that perhaps above-mentioned spectrometer is made up of as main element monochromator and single channel photoelectric sensor, described single channel optoelectronic sensor is connected with described microelectronic processing unit by a signal processing circuit.

Mesopic vision photometer of the present utility model, with the several key elements in each mesopic vision photometry computation model: the measurement mechanism of photopic vision light quantity, noctovision light quantity and spectrum is combined together, only need a light signal sampling, microelectronic processing unit just can obtain the value of all key elements, can go out the light quantity of mesopic vision by computed in software.This mesopic vision photometer is easy to use, is applicable to existing any mesopic vision photometry model.

Above-mentioned mesopic vision photometer can use following method to measure mesopic vision photometric quantity: with described spectrometer measurement by the relative spectral power distribution P of photometry _t(λ), measure by the photopic vision light quantity of photometry, measure by the noctovision light quantity of photometry by described noctovision luminosity probe by described photopic vision luminosity probe; By the P that records _t(λ), the photopic vision luminous efficiency function V (λ) of CIE regulation, the noctovision luminous efficiency function V ' of CIE regulation are (λ) and the relative spectral sensitivity S of described photopic vision luminosity probe _Rel(λ) and the relative spectral sensitivity S ' of noctovision luminosity probe _Rel(λ), calculate photopic vision spectrum correction factor K and noctovision spectrum correction factor K ', and the photopic vision light quantity G that records be multiply by the photopic vision light quantity G that spectrum correction factor K obtains revising with formula _c, the noctovision light quantity G ' that records be multiply by the noctovision light quantity G that spectrum correction factor K ' obtains revising _c', by G _cAnd G _c' calculate photometric quantity of mesopic vision according to model formation.

In the method, photopic vision light quantity that the participation photometric quantity of mesopic vision is calculated and noctovision light quantity are all via the correction of corresponding spectrum correction factor, have the spectrum mistake matching error of luminosity probe to reduce greatly, therefore the photometric quantity of mesopic vision that obtains at last also has higher measuring accuracy.

In sum, mesopic vision photometer of the present utility model, with the several key elements in each mesopic vision photometry computation model: the measurement mechanism of photopic vision light quantity, noctovision light quantity and spectrum is combined together, and only needs a light signal sampling, just can obtain mesopic vision photometric quantity.This mesopic vision photometer is easy to use, is applicable to existing any mesopic vision photometry model.And can practical spectral correction method, the spectrum that significantly reduces luminosity probe loses matching error, has improved the mesopic vision photometric quantity measuring accuracy.

[description of drawings]

Accompanying drawing 1 is the photopic vision relative spectral luminous efficiency curve V (λ) of CIE regulation and the noctovision relative spectral luminous efficiency curve of CIE regulation;

Accompanying drawing 2 is embodiment synoptic diagram of the present utility model.

[embodiment]

A kind of mesopic vision photometer comprises one by the rapid spectrometer 1 of detector array 1-1 as electrooptical device, adopts concave surface flat field grating 1-3 to by the photometry beam split in this rapid spectrometer 1.The photopic vision luminosity probe 2 that the photopic vision luminous efficiency function V (λ) of spectral response sensitivity and CIE regulation is complementary, the noctovision luminosity probe 3 that the noctovision luminous efficiency function V ' of spectral response sensitivity and CIE regulation (λ) is complementary, described spectrometer is electrically connected with microelectronic processing unit 4, and described photopic vision luminosity probe 2 and noctovision luminosity probe 3 are electrically connected with described microelectronic processing unit 4 respectively.Microelectronic processing unit 4 is electrically connected with host computer, and the photopic vision of storage CIE regulation and noctovision spectrum are looked and imitated function V (λ) and V ' (λ), the relative spectral sensitivity S that known photopic vision probe and noctovision are popped one's head in computer software _Rel(λ) and S ' _Rel(λ), the computing formula of absolute light spectral power distributions, the algorithm and the correlation parameter of spectrum resolution correction algorithm and mesopic vision photometry model.

Spectrometer is measured by the relative spectral power distribution P of photometry by light signal collection device 1-2 _t(λ), can be in any position of accepting light signal by the consistent time signal pickup assembly of the spatial spectral distribution of photometry.Photopic vision luminosity probe 2 and noctovision luminosity probe are measured by photometry under same geometric condition, obtain by the photopic vision light quantity G of photometry and noctovision light quantity G '.By the P that records _t(λ), known photopic vision luminous efficiency function V (λ), noctovision luminous efficiency function V ' are (λ) and the relative spectral sensitivity S of described photopic vision luminosity probe _Rel(λ) and the relative spectral sensitivity S ' of noctovision luminosity probe _Rel(λ), calculate photopic vision spectrum correction factor K and noctovision spectrum correction factor K ', and the photopic vision light quantity G that records be multiply by spectrum correction factor K obtain more accurate photopic vision light quantity G _c, the noctovision light quantity G ' that records be multiply by spectrum correction factor K ' obtains more accurate noctovision light quantity G _c'.By photopic vision light quantity G _cWith noctovision light quantity G _c', according to mesopic vision photometry Model Calculation photometric quantity of mesopic vision.

Claims

1. mesopic vision photometer, it is characterized in that: comprise a spectrometer (1) that is used for the measure spectrum distribute power, the photopic vision luminosity probe (2) that the photopic vision luminous efficiency function V (λ) of spectral response sensitivity and CIE regulation is complementary, the noctovision luminosity probe (3) that the noctovision luminous efficiency function V ' of spectral response sensitivity and CIE regulation (λ) is complementary, described spectrometer (1), photopic vision luminosity probe (2) and noctovision luminosity probe (3) are electrically connected with microelectronic processing unit (4).

2. mesopic vision photometer according to claim 1 is characterized in that: described spectrometer (1) is by the rapid spectrometer (1) of detector array (1-1) as photoelectric conversion unit.

3. mesopic vision photometer according to claim 1 is characterized in that: the mechanical scanning type spectrometer that described spectrometer (1) is made up of monochromator and single channel photoelectric sensor.