Integrated lens for terahertz detection

Abstract

The invention discloses an integrated lens for terahertz signal detection. A terahertz photoconductive detector is connected with a detector sleeve through a screw, the silicon rubber is sealed in a counter bore, and a terahertz focusing lens and a terahertz collimating lens are respectively arranged at the two ends of the lens sleeve. A focusing lens pressing sheet and an collimating lens pressing sheet are used for threaded pressing, dispensing and curing, after the detector sleeve and the lens sleeve are screwed in and adjusted to the proper positions through threads, an elastic fastening ring is screwed in, nitrogen is filled into a sealing ring hole, the internal air is exhausted, and then the hole is sealed by a rubber sealing plug, so that the dryness of an internal terahertz transmission path is ensured, and the interference of water vapor absorption on terahertz signals is eliminated. The idea of integrated design is introduced into the design of a terahertz signal detection device, an integrated lens is invented, and the convenience of use and the accuracy of measurement are improved.

Description

Technical field: [0001] The invention belongs to the technical field of terahertz spectroscopy and imaging technology, and in particular relates to an integrated lens for terahertz detection. Background technique: [0002] Terahertz (THz) wave / radiation is a general term for a specific electromagnetic radiation, between microwave and infrared. In the field of electronics, it is also called millimeter wave and submillimeter wave. In the field of spectroscopy, it is also called for far-infrared rays. The frequency of terahertz waves is between 0.1THz and 10THz, and the wavelength is 0.03mm to 3mm. Before the mid-1980s, due to the lack of high-efficiency emission sources and detectors, this band was called the terahertz gap (THz gap). With the rapid development of terahertz technology. [0003] Because of the unique position of terahertz waves in the electromagnetic spectrum, terahertz waves have many unique properties: [0004] 1. Penetration: It has good penetrability to ...

AI Technical Summary

Problems solved by technology

The structural processing accuracy is used to ensure the positioning accuracy of optical components, which overcomes the shortcomings of low manual adjustment accuracy, time-consuming and laborious; the use of threads and glue to fix optical components overcomes the shortcomings of poor system stability; the closed structure, Ensure that the optical path is sealed and will not be exposed to the air, which overcomes the interference of water vapor absorption in free space on the detection of terahertz signals

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