CN201408291Y - Synclastic spectroscope - Google Patents

Abstract

The utility model relates to a synclastic spectroscope, which can generate double beams with short spacing and synclastic transmission. The synclastic spectroscope comprises a glass substrate. One surface of the glass substrate is plated with a half-reflecting film and the other surface is plated with a total reflecting film. The utility model provides the synclastic spectroscope with simple structure, convenient regulation and high precision.

Description

Equidirectional spectroscope

Technical field

The utility model belongs to field of optical detection, relates to a kind of spectroscope, relates in particular to a kind of Equidirectional spectroscope that short spacing is transmitted twin-beam in the same way that produces.

Background technology

In optical detection, because the existence unstable or situations such as skewness of light intensity on beam cross section of light source, cause the reliability of result of detection significantly to reduce, usually in light path, introduce the correction foundation of a reference beam as experimental data in order to address this problem.If adopt different detectors received signal light and reference light simultaneously, the difference of explorer response characteristic can be brought systematic error to experiment, therefore wishes to adopt same detector that flashlight and reference light are surveyed simultaneously.And the reception target surface of detector is generally all little, so the spacing of flashlight and detection light certainly will be little.

The generation of reference light is general adopts a spectroscope that is coated with the half reflection film the light separated into two parts, and a part is as flashlight, and another part is as reference light.The direction of propagation of these two light beams is vertical mutually, if it is transmitted in the same way, then need add a high reflection mirror in a light path and realize.But there is following shortcoming in this optical system:

1, complex structure, use inconvenience.Need add a high reflection mirror when two-beam transmits in the same way and realize, make the whole optical system complex structure, and, bring very big inconvenience for the adjustment of light path because that optical adjusting frame is placed in this optical system is too compact.

2, the gap ratio between flashlight and reference light two light beams is bigger, is at least 20mm by meticulous adjusting, is difficult for being detected device and receives simultaneously.

The utility model content

In order to solve the above-mentioned technical matters that exists in the background technology, the utility model provides a kind of simple in structure, easy to adjust and Equidirectional spectroscope that degree of accuracy is high.

Technical solution of the present utility model is: the utility model provides a kind of Equidirectional spectroscope, and its special character is: described Equidirectional spectroscope comprises glass substrate, and a surface of described glass substrate is coated with the half reflection film; Another surface is coated with total reflection film.

The above-mentioned surface that is coated with the glass substrate of half reflection film is that half is coated with the half reflection film.

The above-mentioned surface that is coated with the glass substrate of total reflection film is that half is coated with total reflection film, and second half opposite face that is not coated with the glass substrate of total reflection film has been coated with the half reflection film.

Above-mentioned half reflection film is the half reflection deielectric-coating.

Above-mentioned total reflection film is a total reflection medium film.

Above-mentioned glass substrate is quartz glass or simple glass.

The utility model has the advantages that:

1, simple in structure.The utility model only adopts the spectroscope of a double-sided coating just a branch of light can be divided into the two-beam of transmission in the same way, and this spectroscope is directly to carry out plated film on glass substrate, one of them surface is coated with total reflection film, be coated with the half reflection film in its facing surfaces, and processing easily, stable performance is compared existing spectroscope and is added high reflection mirror, has simplified the structure of optical system greatly.

2, easy to adjust and degree of accuracy is high.The utility model is owing to adopted the mode of double-sided coating that light source is divided into flashlight and reference light cleverly, spacing between this two light beam compares less, concrete spacing is relevant with the thickness of optical glass substrate, and spacing is adjustable on the millimeter magnitude, and adjusting is not only convenient but also degree of accuracy is high.

Description of drawings

Fig. 1 is the first example structure synoptic diagram provided by the utility model;

Fig. 2 is the second example structure synoptic diagram provided by the utility model.

Embodiment

The utility model provides a kind of Equidirectional spectroscope, comprises glass substrate, and a surface of its glass substrate is coated with the half reflection film; Another surface is coated with total reflection film; Half reflection film and total reflection film all are deielectric-coating, in concrete work, and can be according to the different deielectric-coating of needs plating of operation wavelength.This glass substrate is quartz glass or simple glass, can be used for realizing the purpose of this utility model.

Referring to Fig. 1, Fig. 2, the utility model provides two kinds of different plated film schemes, and wherein the part on the A surface of optical glass substrate is plated the half reflection film among Fig. 1, B surface plating total reflection film; A part of plating total reflection film on the A surface of optical glass substrate among Fig. 2, the part plating half reflection film on B surface.Which kind of scheme to carry out plated film no matter be with, all be at glass substrate one lip-deep half to come plating total reflection film also can be that concentrically ringed mode is come plated film, perhaps other modes are come plated film, its purpose is exactly to make last refraction or reflection ray by glass substrate, reaches two-beam purpose in the same way.Wherein d is spectroscopical thickness, and I0 is an incident light, and i is an incident angle, and I1, I2 and I8, I9 are the two-beams that transmits in the same way through behind the spectroscope.

When the plated film mode be Fig. 1 adopt mode the time, this half reflection film is that part is coated on glass substrate surface; When incident ray I0 process was coated with the glass substrate of half reflection film, incident ray I0 was coated with the glass substrate reflection and the refraction of half reflection film, and forms the first reflection ray I1 and the first refracted ray I3 respectively; When first refracted ray I3 process is coated with the glass substrate of total reflection film, the glass substrate that the first reflection ray I3 is coated with total reflection film all reflects to form the second reflection ray I4, the second reflection ray I4 reflects through the glass substrate that is not coated with the half reflection film, forms the second refracted ray I2; The first reflection ray I1 and the second refracted ray I2 are in the same way.Utilizing the utility model to divide the light time in the same way, when light incides the plated film district of A face, a part of light I1 is reflected, and a part of light I2 is refracted to the B face and does not reflect away in the plated film district through the A surface after by total reflection.

When the plated film mode be Fig. 2 adopt mode the time, total reflection film and half reflection film all are that part is coated on glass substrate surface; When incident ray I0 when not being coated with the glass substrate of total reflection film, incident ray I0 forms third reflect light I5 through the glass substrate refraction; When third reflect light I4 process was coated with the glass substrate of half reflection film, third reflect light I5 was coated with the glass substrate reflection and the refraction of half reflection film, and forms the 3rd reflection ray I6 and fourth reflect light I8 respectively; When the 3rd reflection ray I6 process was coated with the glass substrate of total reflection film, the glass substrate that the 3rd reflection ray I6 is coated with total reflection film all reflected to form the 4th reflection ray I7; When the 4th reflection ray I7 when not being coated with the glass substrate of half reflection film, be refracted and form the 5th refracted ray I9; Fourth reflect light I8 and the 5th refracted ray I9 are in the same way.When light incides the not plated film district on A surface, be refracted to the plated film district on B surface, a part of light I8 sees through, and a part of light reflexes to the plated film district on A surface, and the not plated film district that is totally reflected to the B surface again reflects away, i.e. I9 among Fig. 2.

No matter be which kind of mode to come specific implementation in, utilize Equidirectional spectroscope provided by the utility model, can be divided into the two-beam of transmission in the same way to a branch of light, the spacing of this two-beam is:

$d\sin 2i/\sqrt{n^2-\mathrm{si}{n}^{2}i}$

Wherein, n is the refractive index of glass substrate, and by regulating incident angle i, spacing can be in millimeter magnitude adjusted.Certainly, spectroscopical thickness d is that thin more its effect is good more.For example for the thick glass substrate of 3mm, in the time of incident angle i=45 °, the spacing of transmitting two light beams in the same way is 2.26mm; In the time of i=50 °, spacing is 2.29mm; In the time of i=40 °, spacing is 2.17mm.

Claims (6)

1, a kind of Equidirectional spectroscope is characterized in that: described Equidirectional spectroscope comprises glass substrate, and a surface of described glass substrate is coated with the half reflection film; Another surface is coated with total reflection film.

2, Equidirectional spectroscope according to claim 1 is characterized in that: the described surface that is coated with the glass substrate of half reflection film is that half is coated with the half reflection film.

3, Equidirectional spectroscope according to claim 1 is characterized in that: the described surface that is coated with the glass substrate of total reflection film is that half is coated with total reflection film, and second half opposite face that is not coated with the glass substrate of total reflection film has been coated with the half reflection film.

4, according to claim 1 or 2 or 3 described Equidirectional spectroscopes, it is characterized in that: described half reflection film is the half reflection deielectric-coating.

5, according to claim 1 or 2 or 3 described Equidirectional spectroscopes, it is characterized in that: described total reflection film is a total reflection medium film.

6, Equidirectional spectroscope according to claim 1 is characterized in that: described glass substrate is quartz glass or simple glass.

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