CN208999291U - A kind of integrating sphere photodetector and optical measuring system - Google Patents

Abstract

The utility model belongs to technical field of optical detection, specifically discloses a kind of integrating sphere photodetector and optical measuring system.Wherein, integrating sphere photodetector includes integrating sphere and light source, the integrating sphere offers incident window and exit window, the light source is arranged at the incident window, disk-shaped differentiation plate is provided at the exit window, the differentiation plate can be around its center rotating, and the centre of sphere of the integrating sphere and the line at the center of the differentiation plate are vertical with the differentiation plate, scallop hole is offered on the differentiation plate, the vertex of the scallop hole is overlapped with the center of the differentiation plate, the integrating sphere photodetector further includes light power meter, the light power meter is located at the differentiation side of the plate far from the integrating sphere.Optical measuring system includes above-mentioned integrating sphere photodetector.Integrating sphere photodetector provided by the utility model and optical measuring system can be improved the light-emitting uniformity of integrating sphere, improve Optical Measurement Precision.

Description

A kind of integrating sphere photodetector and optical measuring system

Technical field

The utility model relates to field of optical measuring technologies more particularly to a kind of integrating sphere to go out photodetector and optical measurement System.

Background technique

Integrating sphere is the hollow spheres of an inner wall oiling diffusive white reflective material, and also known as luminosity ball, light lead to ball etc..Integral One or more windows are offered on the ball wall of ball, the receiver hole as light well and placement light receiving element, light source is in ball wall The illuminance generated on upper any point is that the illuminance generated by multiple reflections light is formed by stacking, and is formed on inner wall uniform Illumination, therefore during can effectively reduce optical detection, because of incident light source uneven distribution or beam deviation caused by it is small Error.

Integrating sphere is widely used in the luminous flux of testing light source, colour temperature, the parameters such as light efficiency, in Biochemical Analyzer, The reflectivity that sample is irradiated by light source is measured using integrating sphere, and the concentration etc. of determining sample is calculated according to the reflectivity measured Information.

In integrating sphere detector use process, exit window is injected from integrating sphere incident window and reached to light beam of light source, It is accurately irradiated to the sample for being placed on exit window position, light beam will significantly affect test result in the hot spot distribution of exit window Accuracy, and existing integrating sphere is difficult to that the optical uniformity of outgoing beam is effectively ensured, and therefore, needs the new integrating sphere of one kind and sets Meter improves integrating sphere detection accuracy to guarantee that integrating sphere is emitted optical uniformity.

Utility model content

One of the utility model is designed to provide a kind of integrating sphere photodetector, to improve the uniform in light emission of integrating sphere Property, improve the detection accuracy of integrating sphere.

Another of the utility model is designed to provide a kind of optical measuring system, improves the detection of optical measuring system Precision.

To achieve the above object, the utility model adopts the following technical solutions:

A kind of integrating sphere photodetector, including integrating sphere and light source, the integrating sphere offer incident window and exit window Mouthful, the light source is arranged at the incident window, and disk-shaped differentiation plate, the differentiation plate are provided at the exit window Can be around its center rotating, and the centre of sphere of the integrating sphere and the line at the center of the differentiation plate are vertical with the differentiation plate, institute It states and offers scallop hole on differentiation plate, the vertex of the scallop hole is overlapped with the center of the differentiation plate, the integrating sphere light inspection Surveying device further includes light power meter, and the light power meter is located at the differentiation side of the plate far from the integrating sphere.

Further, the incident window and the exit window center symmetric setting.

Further, the probe of the light power meter, the center of the differentiation plate and the centre of sphere are located along the same line.

Further, the central angle of the scallop hole is 90 °.

Further, the differentiation plate rotation is embedded on the shell of integrating sphere.

Further, the differentiation plate inner surface is coated with diffuse-reflective material.

Further, the exit window is completely covered in the differentiation plate.

Further, the position convex that the integrating sphere corresponds to the incident window is equipped with the first mounting base, the light Source is sealingly mounted in first mounting base.

Further, the integrating sphere correspond to the exit window position convex be equipped with the second mounting base, described point Change plate to be rotatably installed in the second mounting base.

A kind of optical measuring system, including integrating sphere photodetector as described above.

The utility model has the beneficial effects that:

Integrating sphere photodetector provided by the utility model, by being provided with the differentiation plate of scallop hole, differentiation plate rotation It is connected in exit window, when plate is broken up in rotation, the emergent ray of light source is projected from the different location of exit window, thus It can be by the way that the outgoing optical power broken up at the detection exit window different location of the light power meter on the outside of plate be arranged in, to detect The outgoing optical uniformity of exit window, and then setting position of the light source on integrating sphere can be adjusted according to testing result, to adjust Whole outgoing optical uniformity, makes it meet testing requirements, improves the light-emitting uniformity of integrating sphere photodetector, improves integrating sphere The detection accuracy of photodetector.

Optical measuring system provided by the utility model improves optics by using above-mentioned integrating sphere photodetector The measurement accuracy of measuring system.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of integrating sphere photodetector provided by the utility model；

Fig. 2 is the structural schematic diagram of differentiation plate provided by the embodiment of the utility model.

It is marked in figure as follows:

1- integrating sphere；11- incident window；12- exit window；The first mounting base of 13-；The external window of 14-；2- light source；3- Break up plate；31- scallop hole；4- light power meter.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.

Fig. 1 is the structural schematic diagram of integrating sphere photodetector provided by the utility model, as shown in Figure 1, the present embodiment mentions The integrating sphere photodetector of confession includes light source 2, integrating sphere 1, differentiation plate 3 and light power meter 4.Light source 2 exposes to product for providing Incident light inside bulb separation 1；For integrating sphere 1 for making the diffusing reflection in integrating sphere 1 of the light of light source 2, the light out for improving light source 2 is equal Even property, while light-receiving window is provided for other optical detection apparatus；The light that differentiation plate 3 is used to calculate light source 2 projects integral The light-emitting uniformity of ball 1, thus the foundation as the adjustment of 2 position of light source；Light power meter 4 is used to measure from the outgoing of integrating sphere 1 The optical power of light, the index as quantization light-emitting uniformity.

Specifically, as shown in Figure 1, integrating sphere 1 is hollow ball-shape structure, inner wall is coated with diffusing reflection coefficient close to 1 Diffusive white reflective material.The incident window 11 penetrated for 2 light of light source is offered on integrating sphere 1 and is pierced by product for light The exit window 12 of bulb separation 1, incident window 11 and exit window 12 are about 1 center symmetric setting of integrating sphere.

The external window 14 for connecting external optical detection equipment can also be offered on integrating sphere 1, to realize integral Application of the ball photodetector in different Systems for optical inspection.The present embodiment examines the quantity of external window 14 and external optics The type of measurement equipment is not particularly limited.

Light source 2 is arranged at incident window 11, and the light that light source 2 issues enters in integrating sphere 1 from incident window 11.Specifically Ground, can be by the outside projection in position in the corresponding incident window 11 of integrating sphere 1 with the first mounting base 13 of cavity, and light source 2 is close Envelope is mounted in the first mounting base 13, is conducive to the interference for avoiding external environment to 2 light of light source.The light source of the present embodiment meaning 2, the accumulation type light source 2 that can be concentrated for transmitting light beam, or emit the diffused light source 2 of beam spread, the present embodiment Concrete restriction is not carried out to the type of light source 2.

In the present embodiment, the installation site of 2 relative integral ball 1 of light source and setting angle are adjustable, go out so as to basis The installation site and angle of the testing result adjustment light source 2 of optical uniformity, to improve the light-emitting uniformity of integrating sphere 1.

In the present embodiment, the light of light source 2 can be by 11 direct irradiation of incident window at exit window 12, can also Light barrier to be arranged at exit window 12, prevents the light of light source 2 from shining directly into exit window 12, but pass through integral It is just pierced by from exit window 12 after the reflection of 1 inner wall of ball.

Fig. 2 is that the structural schematic diagram of differentiation plate 3 provided by the embodiment of the utility model breaks up plate 3 as depicted in figs. 1 and 2 Be arranged at exit window 12, differentiation plate 3 be disk-shaped structure, break up the center of plate 3, the center of exit window 12, the centre of sphere with And the center of incident window 11 is located along the same line, and breaks up the vertical direct setting of plate 3.

Differentiation plate 3 can be rotated around the center of exit window 12, and specifically, differentiation plate 3 is rotatably embedded the shell in integrating sphere 1 On body, e.g., groove can be set at the spherical shell of exit window 12, the projection flange on the periphery of differentiation plate 3, flange is protruded into recessed In slot, and flange energy confronting grooves rotate.Alternatively, can be in the outside projection second in position of the corresponding exit window 12 of integrating sphere 1 Mounting base is rotatably installed in differentiation plate 3 in second mounting base.

Scallop hole 31 is provided on differentiation plate 3, the vertex of scallop hole 31 is overlapped with the center of differentiation plate 3.When going out for light source 2 When penetrating light by exit window 12, emergent ray is pierced by by scallop hole 31.

The lower section of differentiation plate 3 is provided with light power meter 4, for detecting the optical power for the light being pierced by from scallop hole 31.Light The center probe of power meter 4 is aligned with the center of differentiation plate 3, and when so that differentiation plate 3 rotating, light power meter 4 is in different positions The reception position for the light that the scallop hole 31 at the place of setting is pierced by is identical, reduces the error between measurement every time, improves measurement accuracy.

In the present embodiment, the central angle of scallop hole 31 is 90 °, is conducive to carry out the angle that differentiation plate 3 rotates every time Control.After the light beam that light source 2 issues reaches exit window 12 from incident window 11, a part of light beam is beaten by scallop hole 31 On the probe of light power meter 4, received optical power reads V1 to the record of light power meter 4 at this time.Successively rotated with 90 ° of rotation angle Break up plate 3 three times, records optical power reading V2, V3 and V4 of corresponding light power meter 4 every time, can be obtained and beat in differentiation plate 3 The light beam power of different fan-shaped regions on circumferential area, to can get the optical uniformity that light source 2 is pierced by exit window 12.

When the maximum difference percentage between V1, V2, V3 and V4 is less than preset error value, i.e., expression outgoing beam is equal Even property is met the requirements, and when maximum difference percentage is greater than preset error value, i.e. the uniformity of expression outgoing beam is unsatisfactory for wanting It asks, at this point, can be re-measured by adjusting the installation site and angle of 2 relative integral ball 1 of light source to light-emitting uniformity, directly Meet measurement request to optical uniformity.

In the present embodiment, the central angle of scallop hole 31 is 90 °, and 90 ° of the rotation every time of differentiation plate 3, measuring four times can obtain Obtain the optical uniformity measurement result for entirely breaking up plate 3.In other embodiments, the central angle of scallop hole 31 can be 60 °, this When, 60 ° of the rotation every time of differentiation plate 3, measuring 6 times can be obtained optical uniformity measurement result.In other embodiments, scallop hole 31 Central angle can also be 120 °, 45 °, 30 ° etc., when the central angle of scallop hole 31 is smaller, pendulous frequency is more, measurement accuracy Higher, measurement cost is also higher.

In the present embodiment, the coincident at the fan-shaped edge of scallop hole 31 and differentiation plate 3 is conducive to reduce differentiation plate 3 Area improve the light-emitting uniformity of integrating sphere 1 to reduce the size of exit window 12.

To guarantee that emergent ray is only capable of being pierced by by scallop hole 31, differentiation plate 3 can be with towards the inner surface inside integrating sphere 1 Shading coating, or inner surface coating and the consistent diffuse-reflective material of 1 inner surface of integrating sphere of differentiation plate 3 are set, make to make score The light for changing non-31 region of scallop hole on plate 3 can be completely reflected away, and light is avoided to be absorbed.

In the present embodiment, exit window 12 is completely covered in differentiation plate 3, is conducive to the size for reducing exit window 12, and It avoids the transmitting light beam of light source 2 from projecting from the gap between differentiation plate 3 and exit window 12, influences optical uniformity detection accuracy.

The present embodiment additionally provides a kind of optical measuring system, including above-mentioned integrating sphere photodetector.

Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright Aobvious variation, readjustment and substitution is without departing from the protection scope of the utility model.Therefore, although passing through above embodiments The utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from It can also include more other equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended Scope of the claims determine.

Claims (10)

1. a kind of integrating sphere photodetector, including integrating sphere (1) and light source (2), the integrating sphere (1) offer incident window (11) it is arranged at the incident window (11) with exit window (12), the light source (2), which is characterized in that the exit window It is provided with disk-shaped differentiation plate (3) at mouthful (12), the differentiation plate (3) can be around its center rotating, and the integrating sphere (1) The centre of sphere and the line at the center of differentiation plate (3) are vertical with differentiation plate (3), offer sector on the differentiation plate (3) Hole (31), the vertex of the scallop hole (31) are overlapped with the center of differentiation plate (3), and the integrating sphere photodetector further includes Light power meter (4), the light power meter (4) are located at the side of differentiation plate (3) far from the integrating sphere (1).

2. integrating sphere photodetector according to claim 1, which is characterized in that the incident window (11) and the outgoing Window (12) center symmetric setting.

3. integrating sphere photodetector according to claim 1, which is characterized in that the probe of the light power meter (4), described The center and the centre of sphere for breaking up plate (3) are located along the same line.

4. integrating sphere photodetector according to claim 1, which is characterized in that the central angle of the scallop hole (31) is 90°。

5. integrating sphere photodetector according to claim 1, which is characterized in that differentiation plate (3) rotation is embedded in product On the shell of bulb separation (1).

6. integrating sphere photodetector according to claim 1, which is characterized in that differentiation plate (3) inner surface is coated with Diffuse-reflective material.

7. integrating sphere photodetector according to claim 1, which is characterized in that the differentiation plate (3) is completely covered described Exit window (12).

8. integrating sphere photodetector according to claim 1, which is characterized in that the corresponding incidence of the integrating sphere (1) The position convex of window (11) is equipped with the first mounting base (13), and the light source (2) is sealingly mounted at first mounting base (13) in.

9. integrating sphere photodetector according to claim 1, which is characterized in that the corresponding outgoing of the integrating sphere (1) The position convex of window (12) is equipped with the second mounting base, and the differentiation plate (3) is rotatably installed in the second mounting base.

10. a kind of optical measuring system, which is characterized in that including the described in any item integrating sphere light detections of such as claim 1-9 Device.