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Refractive index measuring device and measuring method for liquid

A liquid refractive index and measuring device technology, which is applied in the field of measurement, can solve problems such as inaccurate liquid refractive index measurement, and achieve the effect of miniaturization

Pending Publication Date: 2019-01-11
BEIJING LINGHANG LIJIA ELECTROMECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a liquid refractive index measurement device and measurement method to solve the problem of inaccurate liquid refractive index measurement in the prior art

Method used

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  • Refractive index measuring device and measuring method for liquid
  • Refractive index measuring device and measuring method for liquid
  • Refractive index measuring device and measuring method for liquid

Examples

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Effect test

Embodiment 1

[0050] Such as figure 2 As shown, Embodiment 1 of the present invention provides a liquid refractive index measuring device, comprising:

[0051] The light source U1, preferably a laser light source, is used to limit the incident angle of the incident light beam;

[0052] The optical resin prism U3 includes an incident surface S1, a first reflective surface S2, a first surface S3 in contact with the liquid to be measured, a second surface S4, a second reflective surface S5, and an outgoing surface S6. The light beam emitted by the light source passes through the After combing the collimating lens, a parallel light beam is formed and enters the incident surface S1 of the optical resin prism, and the incident light beam propagates in the optical resin prism and is reflected on the first reflection surface S2 to form a first reflection The light beam propagates in the optical resin prism and reaches the first surface S3 in contact with the liquid to be measured, where transmiss...

Embodiment 2

[0061] Such as image 3 As shown, Embodiment 2 of the present invention provides a liquid refractive index measuring device. On the basis of Embodiment 1, this embodiment further includes:

[0062] The collimating lens U2 is disposed between the light source U1 and the optical resin prism U3, and is used for converging the light beam emitted from the light source U1 to enter the optical resin prism U3. And the main axis of the collimating lens coincides with the center of the light source.

[0063] Further, the collimating lens U2 is composed of two optical surfaces, one optical surface is an aspheric mirror; the other optical surface is a Powell prism (powerwell lens).

Embodiment 3

[0065] Such as Figure 4 As shown, Embodiment 3 of the present invention provides a liquid refractive index measurement device. On the basis of Embodiment 2, this embodiment further includes an incident surface S1 and an outgoing surface S6. The incident surface S1 is used to convert the incident light into a linear parallel beam; the exit surface S6 is used to focus the second reflected beam so that when the second reflected beam reaches the receiving plane of the line array image sensor, an approximate point is formed. shaped spot.

[0066] Further, the incident surface S1 is a cylindrical mirror / toric lens.

[0067] Further, the emitting surface S6 is an aspheric mirror / toric lens.

[0068] Preferably, the incident surface S1 and the outgoing surface S6 are integrally formed with the optical resin prism, more preferably, they are made of optical-grade transparent resin material; they are integrally formed by injection molding process, so as to ensure the assembly consiste...

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Abstract

The invention relates to a refractive index measuring device and measuring method for liquid. The measuring device comprises a light source for generating a light beam, an optical resin prism for refracting an incident light beam and an image sensor for receiving an image of an emergent light beam, wherein the optical resin prism comprises an inlet surface for allowing the incident light beam to enter, a first reflection surface, a first surface and a second surface which are in contact with the liquid to be measured, a second reflection surface and an outlet surface for focusing and emittingthe light beam to form the emergent light beam; the first reflection surface and the second reflection surface can reflect the light beams; the first surface and the second surface which are in contact with the liquid to be measured can project the light beams; and when the liquid to be measured contains bubbles, liquid between the bubbles can be used for measurement. Therefore, the influence of the bubbles in the liquid to be measured on the measurement of the refractive index of the liquid is reduced. Meanwhile, device minimization is promoted.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a liquid refractive index measurement device and a measurement method. Background technique [0002] In the prior art, the refractive index is one of the important optical parameters of the liquid. With the help of the refractive index, the optical properties, purity, concentration and dispersion of the liquid can be understood. Other parameters (such as temperature) are also closely related to the refractive index. Therefore, the measurement of liquid refractive index is of great significance in the fields of chemical industry, medicine, food, petroleum and so on. [0003] The total reflection critical angle imaging method is a commonly used method for measuring the refractive index of liquids. Based on the principle of total reflection, the refractive index of the liquid to be measured is calculated by measuring the exit angle of light at the critical angle. Such as figu...

Claims

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Application Information

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IPC IPC(8): G01N21/43
CPCG01N21/43
Inventor 马玉峰杨世华魏微徐凯胡朋飞
Owner BEIJING LINGHANG LIJIA ELECTROMECHANICAL
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