阅读说明：本技术 一种太赫兹光谱仪探头 (Terahertz spectrometer probe ) 是由 曲秋红 李萌 于 2019-08-30 设计创作，主要内容包括：本发明涉及一种太赫兹光谱仪探头,包括太赫兹发射天线、连接太赫兹发射天线的发射天线座、太赫兹接收天线、连接太赫兹接收天线的接收天线座,太赫兹发射天线的俯仰和偏摆角度能够被调整,太赫兹发射天线发射出的太赫兹脉冲信号经过固定在准直透镜座上的太赫兹准直透镜调直后入射到分束器,分束器设置在分束器座上并能够旋转,一部分调直后的太赫兹脉冲信号透过分束器,再经过太赫兹聚焦镜一聚焦后入射到样品上；从样品反射回来的太赫兹脉冲信号,经太赫兹聚焦镜一,在分束器上发生透射和反射,经太赫兹聚焦镜二将分束器反射回来的太赫兹脉冲信号平行脉冲汇聚,太赫兹接收天线连接在接收天线座上。本发明具有准确性高、测试范围大的优点。(The invention relates to a terahertz spectrograph probe, which comprises a terahertz transmitting antenna, a transmitting antenna seat connected with the terahertz transmitting antenna, a terahertz receiving antenna and a receiving antenna seat connected with the terahertz receiving antenna, wherein the pitching and the deflection angles of the terahertz transmitting antenna can be adjusted, a terahertz pulse signal transmitted by the terahertz transmitting antenna is straightened by a terahertz collimating lens fixed on a collimating lens seat and then is incident to a beam splitter, the beam splitter is arranged on the beam splitter seat and can rotate, and a part of the straightened terahertz pulse signal penetrates through the beam splitter and is focused by a terahertz focusing mirror and then is incident to a sample; the terahertz pulse signals reflected from the sample are transmitted and reflected on the beam splitter through the first terahertz focusing mirror, the terahertz pulse signals reflected from the beam splitter are converged by the parallel pulses of the second terahertz focusing mirror, and the terahertz receiving antenna is connected to the receiving antenna base. The invention has the advantages of high accuracy and wide test range.)

1. A terahertz spectrograph probe comprises a terahertz transmitting antenna, a transmitting antenna seat connected with the terahertz transmitting antenna, a terahertz receiving antenna, a receiving antenna seat connected with the terahertz receiving antenna and a central processing unit, and is characterized in that the pitching and the yawing angles of the terahertz transmitting antenna can be adjusted, a terahertz pulse signal transmitted by the terahertz transmitting antenna is straightened by a terahertz collimating lens fixed on a collimating lens seat and then is incident to a beam splitter, the beam splitter is arranged on the beam splitter seat and can rotate, and through angle adjustment of the beam splitter, a part of straightened terahertz pulse signal penetrates through the beam splitter and is focused by a terahertz focusing mirror and then is incident to a sample; the terahertz pulse signal reflected from the sample is transmitted and reflected on the beam splitter through the first terahertz focusing mirror, the terahertz pulse signal reflected from the beam splitter is converged in parallel through the second terahertz focusing mirror, the terahertz receiving antenna is connected to the receiving antenna base, and the pitching and deflection angles of the terahertz receiving antenna can be adjusted, so that the pulse is converged to the receiving antenna; the pulse signals collected by the receiving antenna are processed by the central processing unit.

2. The probe of claim wherein the transmit antenna mount, the collimating lens mount, the beam splitter mount, and the first focusing lens mount holding the first focusing lens are secured to a first connecting post, and the second focusing lens mount holding the second focusing lens and the receive antenna mount are secured to a second connecting post perpendicular to the first connecting post to ensure proper alignment of the optical paths.

3. The probe of claim wherein a Menlo Systems or Advantest terahertz transmit antenna is employed.

Technical Field

The invention relates to the field of terahertz optical detection instruments, in particular to a terahertz spectrometer probe.

Background

Commercial terahertz spectrometers generally employ fiber optic antennas as devices for collecting and recovering signals, and perform spectral analysis on the collected signals. Devices such as a terahertz transmitting antenna, a terahertz receiving antenna, a terahertz lens and the like need to be fixed on an optical platform or a flat plate for detection, and manual debugging and detection are needed for signal debugging and detection. The measurement result of the operation mode depends on manual experience, different personnel operations have great influence on the detection result, and the accuracy and the repeatability of data are poor. Online detection of the product cannot be performed. And the workpiece to be tested needs to be fixed on the sample frame, so that the test range is small.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the portable probe which has the advantages of wide application scene, good repeatability, high accuracy and large test range and can be used for online monitoring. The technical scheme is as follows:

a terahertz spectrograph probe comprises a terahertz transmitting antenna, a transmitting antenna seat connected with the terahertz transmitting antenna, a terahertz receiving antenna, a receiving antenna seat connected with the terahertz receiving antenna and a central processing unit, and is characterized in that the pitching and the yawing angles of the terahertz transmitting antenna can be adjusted, a terahertz pulse signal transmitted by the terahertz transmitting antenna is straightened by a terahertz collimating lens fixed on a collimating lens seat and then is incident to a beam splitter, the beam splitter is arranged on the beam splitter seat and can rotate, and through angle adjustment of the beam splitter, a part of straightened terahertz pulse signal penetrates through the beam splitter and is focused by a terahertz focusing mirror and then is incident to a sample; the terahertz pulse signal reflected from the sample is transmitted and reflected on the beam splitter through the first terahertz focusing mirror, the terahertz pulse signal reflected from the beam splitter is converged in parallel through the second terahertz focusing mirror, the terahertz receiving antenna is connected to the receiving antenna base, and the pitching and deflection angles of the terahertz receiving antenna can be adjusted, so that the pulse is converged to the receiving antenna; the pulse signals collected by the receiving antenna are processed by the central processing unit.

Preferably, the transmitting antenna mount, the collimating lens mount, the beam splitter mount and the first focusing lens mount for fixing the first focusing lens are fixed on the first connecting column, and the second focusing lens mount for fixing the second focusing lens and the receiving antenna mount are fixed on the second connecting column perpendicular to the first connecting column, so as to ensure the coaxiality of the optical path.

The terahertz optical device is integrated into a compact structure, and can work only by placing the probe in an application environment without secondary construction. Manual debugging is not needed; the range of use of the probe can extend the detection work from laboratory to on-line monitoring of samples.

Drawings

Fig. 1 is a schematic structural diagram of a probe of a terahertz spectrometer of the invention.

The reference numerals are explained below:

1. transmitting antenna 2, collimating lens 3, beam splitter 4, focusing mirror I5, focusing mirror II 6 and receiving antenna

1. Transmitting antenna seat 8, collimating lens seat 9, beam splitter seat 10, first focusing lens seat 11 and second focusing lens seat

12. Receiving antenna pedestal 13, first connecting column 14 and second connecting column

Detailed Description

The invention provides a probe for nondestructive testing of a terahertz spectrometer. The terahertz transmission and receiving device integrates a terahertz transmission antenna, a receiving antenna, a beam splitter, a focusing lens and a collimating lens to form an independent device, is wide in data acquisition range and wide in application range, can be conveniently used for data acquisition, guarantees data repetition precision, and is convenient for secondary development and use.

The specific structure of the invention is as shown in the attached figure: the terahertz transmitting antenna 1 is installed on a terahertz transmitting antenna seat 7, the pitch and deflection angles are adjusted by screws on the terahertz transmitting antenna seat 7 (an adjusting mechanism is a known technology and is shown in the drawing), transmitted terahertz pulses are straightened into parallel light through a terahertz collimating lens 2, one part of the parallel light enters a beam splitter 3 and is transmitted into the air, and the other part of the parallel light penetrates through the beam splitter and is focused by a focusing mirror 4 to be incident on a sample through angle adjustment of an index plate. Terahertz pulses reflected from a sample are transmitted and reflected on the beam splitter 3 through the first focusing mirror 4, and finally parallel pulses are converged through the second terahertz focusing mirror 5, the terahertz receiving antenna 6 is installed on the receiving antenna seat 12, and the pulses are converged into the receiving antenna through the adjustment of pitching and deflection angles. The collected pulse signals are processed by a central processing unit. The transmitting antenna seat, the collimating lens seat, the beam splitter seat, the focusing lens seat I, the focusing lens seat II and the receiving antenna seat are connected by the connecting column, so that the coaxiality of light paths is ensured. Preferred are terahertz transmitting antennas from Menlo Systems or Advantest.