JPH0334708Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a transmitting and receiving device that uses both radio waves and light waves.

[Conventional technology]

Transmitting/receiving devices that use radio waves such as radar and infrared rays emitted from heating elements have been known for some time, and these devices have both an all-weather target detection function using radio waves and a highly accurate target detection function using infrared rays. and can be widely used.

Therefore, such a device is characterized in that both functions can be used simultaneously or switched, and it is desirable that the device be configured to fully satisfy this feature.

By the way, conventional transmitting/receiving devices have a configuration using a parabolic antenna or the like to perform a target detection function using radio waves, and an optical system that performs a target detection function using infrared rays is added to this structure.

[Problem that the invention attempts to solve]

In the conventional transmitting/receiving device as described above, the problem is where to install the optical system, for example, the size and shape may become large due to mechanical positional relationships, or conversely, it must be housed within a specified size and shape. There were problems in that the functions of both systems were significantly degraded due to these restrictions, and that there were many negative effects in trying to make both systems compatible with completely different frequency bands.

This invention was made in order to solve this problem, and it is a transmitting and receiving device suitable for simultaneous use and switching of radio waves and light waves with a simple configuration, without deteriorating the functions of both radio wave and light wave systems. The purpose is to obtain.

[Means for solving problems]

The transmitting/receiving device according to this invention shares a reflector for radio waves and an optical system for light waves, and is equipped with a sub-reflector having a frequency selection function to separate radio waves and light waves, and serves as a primary radiator for radio waves. A light receiving section for light waves is arranged separately, and the light waves are configured to reach the light wave detector from the light receiver via an optical fiber cable.

[Effect]

In this idea, the device can be made smaller by sharing the radio wave reflector and the light wave optical system, and the sub-reflector separates the radio wave primary radiator from the light receiver. , Even if both radio wave and light wave systems are compatible, the functional deterioration of both systems can be sufficiently minimized.
Furthermore, by using an optical fiber cable, light waves can be easily transmitted.

〔Example〕

The figure shows one embodiment of this invention.
is a main reflector, 2 is a sub-reflector with a frequency selection function, 3 is a primary radiator, 4 is a radio wave transmitter/receiver, 5
1 is a transmitter/receiver switch, 6 is a transmitter, 7 is a receiver, 8 is a signal processor for radio waves, 9 is a light receiver, 10 is an optical fiber cable, 11 is a receiver for light waves, 12 is a light wave detector, 13 is an amplifier, and 14 is a signal processor for light waves.

In the figure, a radio wave signal such as a radar generated by a transmitter 6 is sent to a primary radiator 3 by a transmitter/receiver switch 5, transmitted through a sub-reflector 2, reflected by a main reflector 1, converted into a plane wave, and then spaced out. radiated to. vice versa,
The reflected signal from the target takes the opposite path to the one it was transmitted,
The signal is sent to the receiver 7 by the transmitter/receiver switch 5, and the target signal is detected by the signal processor 8.

On the other hand, light waves such as infrared rays emitted from the target are
It is reflected by the main reflecting mirror 1, further reflected by the sub-reflecting mirror 2, focused on the light receiving section 9 for light waves, passes through the optical fiber cable 10, and reaches the light wave detector 12. The optical signal from the target is converted into an electrical signal here, further amplified by an amplifier 13, and a signal processor 14 detects the target signal.

According to the above method, the light receiving section 9 for light waves can be arranged separately from the primary radiator 3 for radio waves by the sub-reflector 2 having a frequency selection function, and the light receiving section 9 for light waves can be placed at the focal position of the mirror surface. Since the section 9 can be arranged, the device can be configured without impairing the functions of the radio wave system and the light wave system.

For example, a sub-reflector with a frequency selection function is realized by applying a coating film that reflects light waves in a predetermined wavelength band to a dielectric plate that has a thickness of half a wavelength or an integral multiple of that, which has high radio wave transmittance. can.

Furthermore, the light waves detected by the light wave detector 12 are not limited to infrared rays, but may also be visible light or ultraviolet rays, and in any case, a light signal from the target can be detected. moreover,
The light waves to be detected are not limited to receiving light waves directly emitted from the target, but may also be light waves irradiated toward the target from a light transmitter installed at another position and receiving reflected light from the target.

[Effect of idea]

As described above, according to this invention, a sub-reflector having a frequency selection function that separates radio waves and light waves is provided, the primary radiator for radio waves and the detector for light waves are arranged separately, and the light wave The simple configuration of transmitting the information using an optical fiber cable has the effect of providing a transmitting/receiving device that can operate both radio wave and light wave systems without deteriorating their functions.

[Brief explanation of drawings]

The figure is a configuration diagram of an embodiment of a transmitting/receiving device according to this invention. In the figure, 1 is a main reflector, 2 is a sub-reflector, 3 is a primary radiator, 4 is a transmitter/receiver, 5 is a transmitter/receiver switch, 6 is a transmitter, 7 is a receiver, 8 is a signal processor, and 9 is a Light receiving unit, 10 is an optical fiber cable, 1
1 is a light receiver, 12 is a light wave detector, 13 is an amplifier,
14 is a signal processor.

Claims (1)

[Scope of utility model registration request] The main reflector, which transmits radio waves and reflects light waves,
a sub-reflector having a frequency selection function to separate the two; a primary radiator provided at or near the focal point of the radio waves formed by the main reflector;
a transmitter/receiver connected to the primary radiator and configured to transmit and receive radar signals; a light receiving unit disposed on the same axis as the primary radiator and facing the secondary reflector; and a light receiving unit and a light wave detection unit. 1. A transmitting/receiving device comprising: an optical fiber cable that connects the transmitting/receiving device to the device.