Solid and liquid refractive index comprehensive measurement device

Abstract

The utility model belongs to the technical field of physical measurement, and particularly relates to a solid and liquid refractive index comprehensive measurement device. The measuring device comprises a laser, a polarizer, a sample turntable, an angle meter, an optical detector, an optical power indicator, an optical guide rail, an optical sliding block and a reading displacement platform, the laser emits a monochromatic light beam; the polarizer is used for adjusting the polarization angle of a light beam emitted by the laser; the sample turntable is provided with a hollow encoder for measuring the rotating angle of the sample relative to the optical axis of the optical system; the optical detector is provided with a slit, converts the intensity of light into an electric signal, and can be mounted on a rotating arm of the sample turntable or an optical sliding block with a displacement platform; the optical power indicator detects an electric signal of the optical detector and indicates the intensity of light. The device is reasonable in structure and convenient to operate, and the use cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to physical measuring device technical field, concretely relates to a solid and liquid refractive index comprehensive measuring device. BACKGROUND

[0002] Refractive index refers to the ratio of the sine of the incident angle i and the refractive angle r when light is obliquely incident into another transparent medium, and is one of the most important basic parameters of matter, like mass and density.

[0003] For the refractive index measurement in the process of university physics experiment teaching, there is no convenient and comprehensive measurement method at present, but how to clearly and accurately measure the refractive index, which is the most important property of optical materials, has important significance. The performance change of the material such as solution concentration and material internal stress change can be judged very conveniently through the measurement of refractive index, and the measurement has wide application in the fields of optics, chemical industry, medicine and the like. SUMMARY

[0004] The utility model discloses a solid and liquid refractive index comprehensive measuring device with reasonable structure, convenient operation and low use cost.

[0005] The solid and liquid refractive index comprehensive measuring device provided by the utility model realizes comprehensive measurement of solid and liquid refractive indexes by using the same optical system, and comprises a laser, a polarizer, a sample turntable, an angle meter, a light detector, a light power indicator, a reading displacement platform, a plurality of optical slides and an optical guide rail.

[0006] The laser, the polarizer, the sample turntable and the reading displacement platform are arranged on the optical slides, and the optical slides are arranged on the optical guide rail in sequence and can slide back and forth on the optical guide rail to adjust the spacing between the optical slides.

[0007] The light detector has two, one is connected with the sample turntable and can rotate around the sample turntable, and the other is connected with the reading displacement platform and can move horizontally.

[0008] The angle meter is connected with the sample turntable and can measure the rotation angle of the sample turntable.

[0009] The light power indicator is connected with the two light detectors.

[0010] Among them:

[0011] The laser is used for emitting monochromatic light beams.

[0012] The polarizer is used for adjusting the polarization angle of the light beams emitted by the laser.

[0013] The sample turntable is used for placing samples; the samples are solid to be measured or containers containing liquid to be measured;

[0014] The light detector is provided with a slit and is used for converting the intensity of the irradiated light into an electric signal which is transmitted to the light power indicator through a cable;

[0015] The reading displacement platform is used for moving the light detector laterally and reading the displacement amount;

[0016] The light power indicator is used for detecting the electric signal of the light detector and indicating the intensity of the light in a digital manner.

[0017] In the utility model, the sample turntable comprises a sample supporting tray, a hollow encoder, a rotating cantilever and a supporting rod;

[0018] The supporting rod is a cylinder and is fixedly arranged on the displacement platform slider;

[0019] The hollow encoder comprises an inner ring and an outer ring, the inner ring and the outer ring can rotate relative to each other, the sample supporting tray is arranged on the hollow encoder, is fixedly connected with the outer ring of the hollow encoder, and the inner ring of the hollow encoder is fixedly connected with the top end of the supporting rod; the angle gauge is connected with the hollow encoder in a data mode; that is, the whole sample supporting tray and the hollow encoder are arranged on the top end of the supporting rod, can rotate the sample supporting tray with the supporting rod as the rotating shaft, can drive the outer ring of the hollow encoder to rotate, so that the outer ring and the inner ring rotate relative to each other and offset, can output the electric signal data of the offset, and the electric signal data is displayed through the angle gauge;

[0020] The rotating cantilever is provided with a hole at one end and is nested on the supporting rod and can rotate with the supporting rod as the rotating shaft; the light detector is arranged at the other end of the rotating cantilever and can rotate around the sample supporting tray with the rotating cantilever;

[0021] The angle gauge is connected with the hollow encoder and can measure the rotating angle of the sample supporting tray.

[0022] In the utility model, there are two measurement modes:

[0023] 1. When the refractive index of a solid is measured by using the Brewster angle method, the sample surface is located in the middle of the sample turntable, the normal line of the sample surface is at the same angle with the rotating arm and the optical axis, and the light beam is sequentially propagated according to the order of the laser, the polarizer, the sample and the light detector;

[0024] 2. When the refractive index of a solid or liquid is measured by using the offset method, the incident surface of the sample to be measured is at an angle with the optical axis, the light detector is installed on the optical slider with the reading displacement platform, and the light beam is sequentially propagated according to the order of the laser, the sample to be measured and the light detector.

[0025] When the utility model is used, first, the measurement mode is selected according to the sample to be measured and the effect to be measured:

[0026] When measuring the solid refractive index by the Brewster angle method, the polarizer is rotated by means of a standard sample to make the light beam incident as p light, the sample to be measured is replaced to draw a curve of the reflected light and the incident angle and calculate the refractive index; when measuring the solid refractive index by the offset method, the incident surface of the sample to be measured is at an angle with the optical axis, the light detector is installed on the optical slide with a reading displacement platform, the light beam sequentially propagates according to the order of the laser, the sample to be measured and the light detector, the offset angle and the offset distance curve is drawn and the sample refractive index is calculated;

[0027] When measuring the liquid refractive index by the offset method, the sample to be measured is loaded in a plexiglass container, the plexiglass incident surface is at an angle with the optical axis, the light detector is installed on the optical slide with a reading displacement platform, the light beam sequentially propagates according to the order of the laser, the sample to be measured and the light detector, the offset angle and the offset distance curve is drawn and the sample refractive index is calculated.

[0028] The utility model discloses a reasonable structure, easy operation, two kinds of measurement methods are comprehensively reduced the use cost. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the front view of the utility model.

[0030] Figure 2 It is the plan view of the utility model when measuring the solid refractive index by the Brewster angle method.

[0031] Figure 3 It is the plan view of the utility model when measuring the solid or liquid refractive index by the offset method.

[0032] Figure 4 It is the sample turntable structure diagram.

[0033] The figure mark: 1 is the laser, 2 is the polarizer, 3 is the sample turntable, 4 is the angle meter, 5 is the light detector, 6 is the optical power indicator, 7 is the optical slide, 8 is the reading displacement platform, 9 is the optical guide rail, 10 is the sample or the container with the liquid to be measured, 11 is the sample support tray, 12 is the hollow encoder, 13 is the rotating cantilever, 14 is the support rod. DETAILED DESCRIPTION

[0034] The utility model is further explained below in combination with the drawings.

[0035] The utility model discloses a laser, polarizer, sample turntable, angle meter, two light detectors, optical power indicator, four optical slides, reading displacement platform and optical guide rail.

[0036] The laser 1, the polarizer 2, the sample turntable 3 and the reading displacement platform 8 are arranged on an optical slider 7 respectively, and the optical slider 7 is arranged on the optical guide rail 9 in turn and can slide back and forth on the optical guide rail 9 to adjust the spacing between the optical sliders 7; the optical guide rail 9 is used for bearing the optical sliders 7.

[0037] The optical detector 5 has two, one is connected with the sample turntable 3 and can rotate around the sample turntable 3; the other is connected with the reading displacement platform 8 and can move horizontally with the moving block of the reading displacement platform 8.

[0038] The sample turntable 3 comprises a sample support tray 11, a hollow encoder 12, a rotating cantilever 13 and a support rod 14.

[0039] The support rod 14 is a cylinder and is fixedly arranged on the optical slider 7.

[0040] The hollow encoder adopts an existing conventional encoder product (for example, ZKT80), comprising an inner ring and an outer ring, the inner ring and the outer ring can rotate relative to each other, the sample support tray 11 is arranged on the hollow encoder 12 and is fixedly connected with the outer ring of the hollow encoder 12, and the inner ring of the hollow encoder 12 is fixedly connected with the top end of the support rod 14; the angle gauge 4 is connected with the hollow encoder 12 in data, the angle gauge 4 can detect the electrical signal output by the hollow encoder 12 and indicate the sample deviation angle from the optical axis in a digital manner, and measure the rotating angle of the sample support turntable 11; that is:

[0041] The whole sample support tray 11 and the hollow encoder 12 are arranged on the top end of the support rod 14, can rotate the sample support tray 11 with the support rod 14 as the rotating shaft, drive the outer ring of the hollow encoder 12 to rotate, so that the outer ring and the inner ring produce relative rotation deviation, can output the electrical signal data of the deviation, and display the electrical signal data through the angle gauge 4.

[0042] The sample support tray 11 is provided with a hand screw bolt on the side, the hand screw bolt is adjusted to adjust the tightness between the sample support tray 11 and the support rod 14, so as to fix or rotate the sample support tray 11; the sample support tray 11 is also provided with a sample clamp, the hand screw bolt is adjusted to adjust the tightness of the clamp clamping the sample; as Figure 4 shown;

[0043] The rotating cantilever 13 is provided with a ring sleeve with a hand screw bolt at one end, is nested on the support rod 14, can rotate with the support rod 14 as the rotating shaft, the hand screw bolt is adjusted to adjust the tightness of the ring sleeve on the support rod 14, so as to adjust the rotation or fixation of the rotating cantilever 13; the optical detector 5 is arranged on the other end of the rotating cantilever 13 through a connecting rod, can rotate around the sample support turntable 11 with the rotating cantilever 13. Figure 4 shown.

[0044] The light power indicator 6 is connected with the two light detectors 5, and is used for displaying the detection data of the detector 5.

[0045] The laser 1 emits a monochromatic light beam; the polarizer 2 is a polaroid, and the polarizer 2 is used for adjusting the polarization angle of the light beam emitted by the laser 1; the sample turntable 3 can be installed with standard samples, samples to be measured and liquid containers to be measured; the angle meter 4 can output the displacement bias of the angle of rotation of the sample turntable 3 as an electric signal, restore the angle data, and display on the screen of the angle meter 4; the light detector 5 can convert the intensity of the irradiated light into an electric signal, transmit the electric signal to the light power indicator 6 through a data cable, and display the intensity of the light on the light power indicator 6 in a digital manner.

[0046] The reading displacement platform 8 adopts a conventional displacement adjusting device on the market, and includes a bottom fixed base and a moving block arranged on the base and provided with a scale number, and the bottom fixed base is arranged on the optical slide 7; the light detector 5 is fixedly connected with the moving block through a connecting rod; the reading displacement platform 8 is used for reading the lateral displacement amount of the light detector 5 carried thereon relative to the central axis of the optical system; and the optical guide rail 9 is used for bearing the optical slide 7 to move along the central axis of the optical system.

[0047] When the utility model is used, firstly, according to the sample to be measured and the effect to be measured, the measurement mode is selected:

[0048] When the solid refractive index is measured by using the Brewster angle method, the standard sample is rotated to make the light beam incident as p light, the sample to be measured is replaced to draw the reflection light and incident angle relationship curve and calculate the refractive index; when the solid refractive index is measured by using the offset method, the incident surface of the sample to be measured forms an angle with the optical axis, the light detector is installed on the optical slide with the reading displacement platform, the light beam sequentially propagates according to the order of the laser, the sample to be measured and the light detector, the offset angle and offset distance curve are drawn and the sample refractive index is calculated;

[0049] When the solid or liquid refractive index is measured by using the offset method, the light beam is aligned to be parallel to the optical system and focused on the surface of the light detector, the sample is installed on the sample turntable and the angle is set to zero, the rotating cantilever under the sample turntable is rotated to be perpendicular to the guide rail direction, that is, the light detector on the rotating cantilever is moved away from the test experiment, the sample turntable is rotated to offset the light beam, the slit in front of the light detector installed on the reading displacement platform is aligned with the offset light spot (that is, the light intensity on the light power indicator is maximum) and the offset distance is read on the scale on the reading displacement platform, and multiple sets of offset angle and offset distance are recorded and the sample refractive index is calculated.

[0050] The utility model solves the problem that the current, such as spectrometer method, needs to prepare angle accurate three prism, ellipsometer method cannot measure liquid refractive index; The utility model has the advantages of wider range of measurable refractive index, clearer principle, two kinds of testing methods in a set of device, which is convenient for quick and intuitive teaching experiment in classroom.

[0051] Although the above methods are illustrated and described as a series of structures for simplicity of explanation, it is to be understood and appreciated that the methods are not limited by the illustrated order of the structures as some structures can occur in different orders and / or concurrently with each other, and / or with other structures from those structures described herein and / or described herein but not illustrated.

[0052] The foregoing description of the present disclosure has been provided for the purposes of facilitating understanding of the present disclosure by any person skilled in the art. Various modifications to the present disclosure will be apparent to those skilled in the art, and the generic principles defined herein can be applied to other variations without departing from the spirit or scope of the present disclosure. Thus, the present disclosure is not intended to be limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for measuring the refractive index of a solid and a liquid, characterized in that, The utility model relates to a kind of laser, polarizer, sample turntable, goniometer, light detector, optical power indicator, reading displacement platform, several optical slides and optical guide rail;The laser, polarizer, sample turntable, reading displacement platform are respectively arranged on optical slide, and optical slide is sequentially arranged on optical guide rail, and can slide back and forth on optical guide rail, adjust the spacing between each optical slide;The light detector has two, one is connected with sample turntable, can revolve around sample turntable, and the other is connected with reading displacement platform, can move horizontally transversely;The goniometer is connected with sample turntable, can measure the angle of rotation of sample turntable;The optical power indicator is connected with two light detectors;Wherein:The laser is used to emit monochromatic light beam;The polarizer is used to adjust the polarization angle of light beam emitted by laser;The sample turntable is used to place sample;The light detector has slit, is used to convert the intensity of irradiated light into electrical signal, and is transmitted to optical power indicator by cable;The reading displacement platform is used to move light detector transversely and read displacement amount;The optical power indicator is used to detect electrical signal of light detector, and indicates the intensity of light in digital mode. The sample turntable includes sample support tray, hollow encoder, rotating cantilever and support rod; The support rod is cylindrical body, fixedly arranged on displacement platform slider; The hollow encoder includes inner ring and outer ring, and the inner ring and the outer ring can rotate relative to each other, the sample support tray is arranged on the hollow encoder, and the outer ring of the hollow encoder is fixedly connected with the sample support tray, and the inner ring of the hollow encoder is fixedly connected with the top end of the support rod;The goniometer is connected with the hollow encoder in data mode;That is, the entire sample support tray and hollow encoder are arranged on the top end of the support rod, can rotate the sample support tray with the support rod as the rotating shaft, can drive the outer ring of the hollow encoder to rotate, so that the outer ring and the inner ring produce relative rotation offset, can output offset electrical signal data, which is displayed by the goniometer; The rotating cantilever is nested on the support rod with the hole at one end, and can rotate with the support rod as the rotating shaft;The light detector is arranged on the other end of the rotating cantilever, and can revolve around the sample support turntable with the rotating cantilever rotating; The goniometer is connected with the hollow encoder, and can measure the angle of rotation of the sample support turntable. ​ ​ ​ ​ ​ ​ ​ 2. The apparatus of claim 1, wherein, ​ ​ ​ ​ ​

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