CN2723987Y

CN2723987Y - Reflectivity detector by absolute law

Info

Publication number: CN2723987Y
Application number: CN 03210473
Authority: CN
Inventors: 吴洪池
Original assignee: SHANGHAI TECHCOMP INSTRUMENT Ltd
Current assignee: SHANGHAI TECHCOMP INSTRUMENT Ltd
Priority date: 2003-09-09
Filing date: 2003-09-09
Publication date: 2005-09-07
Anticipated expiration: 2013-09-09

Abstract

The utility model discloses a reflectivity detector by absolute law, compising a platform. The utility model is characterized in that the reflectivity detector by absolute law also is composed of four upright posts, four reflecting mirrors, a supporting frame, a supporting rod, a reflecting mirror and a height adjusting device. The four upright posts are fixed to the platform and arranged into an isosceles trapezoid; the four reflecting mirrors, whose mirror face is adjustable in the horizontal direction, are arranged on the upright posts; the supporting frame, whose line of symmetry is coincident with the line of symmetry of the isosceles trapezoid, is arranged on the platform; the supporting rod, connected with the supporting frame through a rotating shaft, can rotate around the rotating shaft; the reflecting mirror, which can evert around the supporting rod, is fixed on the supporting rod; the height adjusting device, fixed on the platform and positioned on the line of symmetry of the isosceles trapezoid, is symmetrically arranged on the both sides of the supporting frame. In the process of measuring reflectivity, the utility model need not to consider the objective factors such as the resting period and the surface finish quality of the reference sample, etc, but the measured data is true and believable.

Description

Absolute method reflectance test device

Technical field

The utility model belongs to optic analytical instrument, relates in particular to utilize level crossing to come the device of measuring optical product reflectivity.

Background technology

Relative method is mainly adopted in the test of optical articles reflectivity at present, and promptly the level crossing that surface finish is good plates reflectance coating earlier, this sample is placed on the spectrophotometer tests then, and this reading is put 100, and the reflectivity of this standard specimen is decided to be 100% artificially; Again measured object (plane mirror) is placed on the raw sample position, surveys once, how many its reading and samples relatively be just can draw reflectivity by its shared number percent, if reading is 80, then the reflectivity of this measured object is 80%.Yet this method of testing comes with some shortcomings:

1) sample as a reference, its reflectivity can change along with the length of resting period, and perhaps smooth finish, the flatness owing to minute surface is different and different, thereby the test product reflectivity data is also along with variation.

2) reflectivity that records is not the real reflectance of sample, can only judge and compare the high or low of sample reflectivity.

Summary of the invention

The utility model technical issues that need to address are to provide a kind of absolute method reflectance test device, to overcome the defective that prior art can't truly reflect the test product reflectivity utterly.

The technical solution of the utility model is:

A kind of absolute method reflectance test device, comprise platform, be fixed on four root posts that are arranged in isosceles trapezoid on the platform, be installed in the four sides catoptron of scalable minute surface horizontal direction on the column end face, be installed on the platform and line of symmetry and the consistent support of described isosceles trapezoid line of symmetry, be connected the pole that also can rotate around the axis with support by rotating shaft, being fixed on pole by another rotating shaft upward also can be around a catoptron of this rotating shaft upset, be fixed on the platform, be positioned on the described isosceles trapezoid line of symmetry and be symmetrically distributed in the arrangement for adjusting height of support both sides, the minute surface direction of the four sides catoptron on the described column is vertical with platform.

Described column by screw retention on platform, because screw is opened greatlyyer, when the catoptron on the column need be finely tuned, can rotate a lower pillar stand slightly, so that the catoptron on support turns over the turnback front and back around support, emergent ray can both penetrate with the angle identical with incident ray after through five catoptrons.

Described arrangement for adjusting height is used for supporting the catoptron on the pole, can change its height by the screw of screwing on this regulating device, thereby also can change the angle of pole upper reflector, to satisfy the correct reflection of light.Catoptron on the described support can rotate 180 ° by rotating shaft, and it can be had with strict two the symmetrical positions of the shaft axis on the support.

The beneficial effects of the utility model are, because in the test of background scans and test product, the order of reflection of several catoptrons is all identical with the reflection spot position on the device, thereby the radiation intensity of the twice detected several times catoptron in front and back is identical, can offset, different only being, after putting into test product, by making light pass through test product twice by 180 catoptrons of spending the upset placement, thereby conveniently obtained real reflectivity through after opening in the data of considering to record on the test product basis, be absolute reflectance, irrelevant with the reflectivity of instrument reference mirror.Like this, when measurement of reflectivity,, make measurement data genuine and believable not with objective factors such as the resting period of considering reference sample itself, surface smoothnesses.

Description of drawings

Fig. 1 is the structural representation of the utility model reflection unit;

Light path synoptic diagram when Fig. 2 carries out background scans for the utility model;

Light path synoptic diagram when Fig. 3 carries out product test for the utility model

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

As Fig. 1, the utility model comprises platform 6, be fixed on four root posts 7 that on the platform and on platform, are arranged in isosceles trapezoid, be installed in the four sides catoptron 1 of scalable minute surface horizontal direction on column 7 end faces, 2,4,5, be installed on the platform 6 and support 8 that line of symmetry is consistent with described isosceles trapezoid line of symmetry, be connected the pole 9 that also can rotate around the axis with support 8 by rotating shaft, being fixed on by another rotating shaft also can be around a catoptron 3 of pole upset on the pole 9, be fixed on the platform, be positioned on the described isosceles trapezoid line of symmetry and be symmetrically distributed in the arrangement for adjusting height 10 of support 8 both sides, the minute surface direction of the four sides catoptron on the described column is vertical with platform.

Described four sides catoptron, is established on the end face of column 7 and can be changed the minute surface direction adjusting screw is arranged on the end face of column 7 by silica stationary, thereby makes the incident direction of light with to penetrate direction identical.

The pedestal of placing test product is installed on the described support 8.

As Fig. 2, when carrying out background scans, at first regulate on the column minute surface direction of four sides catoptron 1,2,4,5 and support upper reflector 3 so that light is injected the direction of catoptron 1 with consistent from the direction of catoptron 5 ejaculations, catoptron 3 is positioned at the place of support (promptly waiting to put the position of test product) lower end 40mm in this case, minute surface is towards support, and catoptron 1 and 5,2 and 4 all left-right symmetric is distributed in the support both sides.As figure, light is with the direction incidence reflection mirror 1 of parallel mirror 3 in this case, the angle that incident light and emergent light are formed on the catoptron 2 is 20 °, the angle that incident light and emergent light are formed on the catoptron 3 is 15 °, direction when light path is transferred afterwards according to incident through 1,2,3,4,5 five catoptron penetrates, and can measure its radiant energy intensity this moment by the detecting device of back.As Fig. 3, test product is placed on the support, again catoptron 3 is turned over turnback around the shaft, be located at the 40mm place, top of figure medium-height trestle, minute surface is towards support, at this moment, light path is at first injected the test product minute surface through after the catoptron 1 and 2, reflex to catoptron 3 then, reflex to the test product minute surface again, penetrate through catoptron 4,5 more at last, the direction during the light outgoing is identical during with incident at first.Compare with background scans, catoptron 1,2,3,4, the number of times of 5 reflections and the drop point of light are all identical, two secondary reflections have been experienced on the test product that different are to be put into, thereby the radiant energy intensity of seven optical radiation energy intensity behind the secondary reflection, five these reflection back light will be less than background scans the time, before and after be the same only in the secondary detection through the radiation intensity that scans behind five catoptrons in the device, can disappear mutually, that is to say whether unanimity is at all considering for the reflectivity of sample catoptron as a reference itself, and the radiation intensity that records after putting into test product is the product of the secondary reflection rate of test product, is the real reflectance of sample with obtaining the data extraction of square root.

Claims

1. absolute method reflectance test device, comprise platform (6), it is characterized in that: also comprise being fixed on four root posts (7) that are arranged in isosceles trapezoid on the platform, be installed in the four sides catoptron (1 of scalable minute surface horizontal direction on column (7) end face, 2,4,5), being installed in platform (6) goes up and the line of symmetry support (8) consistent with described isosceles trapezoid line of symmetry, be connected the pole (9) that also can rotate around the axis with support (8) by rotating shaft, being fixed on pole (9) by another rotating shaft goes up also and can be fixed on the platform (6) around a catoptron (3) of pole upset, be positioned on the described isosceles trapezoid line of symmetry and be symmetrically distributed in the arrangement for adjusting height (10) of support (8) both sides; The minute surface direction of the four sides catoptron on the described column (1,2,4,5) is vertical with platform (6).

2. reflectance test device as claimed in claim 1 is characterized in that: described four sides catoptron (1,2,4,5) is fixed on by screw on the end face of column (7), establishes on the end face of column (7) can change the minute surface direction adjusting screw is arranged.

3. reflectance test device as claimed in claim 1 is characterized in that: described arrangement for adjusting height is provided with the screw of regulating height.

4. reflectance test device as claimed in claim 1 is characterized in that: the pedestal of placing test product is installed on the described support 8.