Plastic injection molded integrated lens for wireless laser communication

Abstract

The invention relates to a plastic injection molded integrated lens for wireless laser communication, which belongs to the technical field of wireless laser communication. In the prior art, coaxial calibration needs to be performed on respective object lens systems of an aiming part, a transmitting part and a receiving part, and assembly efficiency is low. The invention relates to first lenses in the respective object lens systems of all the parts of a wireless laser communication optical transmitter and receiver, wherein the first lens in the object lens system of the receiving part, namely a receiving lens, comprises a plurality of sub-lenses distributed on a same circumference, the diameter of an externally tangent circle of the plurality of the sub-lenses is 100-250mm, and mirror surfaces of the same sides of the plurality of the sub-lenses belong to one part of a revolution curved surface; the first lens of the object lens system of the transmitting part, namely a transmitting lens, is concentric with the externally tangent circle; the first lens of the object lens system of the aiming part, namely an aiming lens, is positioned on the edge of the externally tangent circle and in a region between the two sub-lenses; and respective optical axes of the receiving lens, the transmitting lens and the aiming lens are parallel to each other, and the receiving lens, the transmitting lens and the aiming lens are mutually connected by baseplates and the baseplates are made of same material which is optical plastic.

Description

technical field [0001] The invention relates to an integrated lens for wireless laser communication injection molding. The first lens of the objective lens system of the aiming part, the receiving part and the transmitting part of the wireless laser communication optical transceiver is integrated by injection molding, and is used in the wireless laser communication optical transceiver. The method does not need to perform comprehensive coaxial calibration on these objective lens systems during assembly, improves assembly efficiency, and belongs to the technical field of wireless laser communication. Background technique [0002] Wireless laser communication refers to optical communication that uses laser waves as the carrier and the atmosphere as the transmission medium. Compared with microwave communication, wireless laser communication has the characteristics of large information capacity, wide frequency band, strong anti-electromagnetic interference ability, and good confi...

AI Technical Summary

Problems solved by technology

However, there are still some shortcomings: 1. The multi-optical axis leveling of multiple receiving objective lenses is relatively difficult

The field stop of each receiving part is the end face of the multimode fiber located at the focal point of the receiving objective lens. Since the effective incident angle of the multimode fiber is generally not greater than 20 microradians, the effective field angle of each receiving part is not greater than 20 Therefore, it is necessary to ensure that the parallel error of the optical axes of multiple receiving objective lenses is not higher than 20 microradians during the assembly and adjustment process. Such a precise parallelism of the optical axes makes adjustment very difficult; 2. The parallelism of the optical axes described above is It is difficult to maintain in dynamic; 2. There are many transmission links of communication laser, such as the coupling from lens to optical fiber, the synthesis from multiple optical fibers to one optical fiber, and the low coupling efficiency of optical fiber, which leads to the decrease of communication laser signal intensity

[0004] In addition, in the large-aperture receiving solution, on the one hand, the objective lens has a larger aperture, and on the other hand, the material of the objective lens is usually optical glass. Therefore, this solution also increases the weight of the laser communication device

Furthermore, regardless of the solution, it is still necessary to perform coaxial calibration on the objective lens systems of the aiming part, the transmitting part and the receiving part, resulting in low assembly efficiency of wireless laser communication optical transceivers, which has become a prominent problem in mass production

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