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    • 3. 发明申请
    • DEVICE FOR MEASURING PHYSICAL QUANTITIES BY TRANSMITTING AND RECEIVING ELECTROMAGNETIC RADIATION
    • 通过发射和接收电磁辐射测量物理量的装置
    • WO1990004761A1
    • 1990-05-03
    • PCT/SE1989000566
    • 1989-10-16
    • AKTIEBOLAGET INSTITUTET FÖR VATTEN- OCH ...GALLE, Bo
    • AKTIEBOLAGET INSTITUTET FÖR VATTEN- OCH ...
    • G01J03/42
    • G01N21/3504G01N2021/0314Y10S359/90
    • Arrangement for transmission and reception of electromagnetic radiation. A transmitting and receiving part (1) transmits and receives the electromagnetic radiation, and a reflecting part (2) reflects the transmitted electromagnetic radiation back to the transmitting and receiving part while passing through a medium which transmits radiation. The transmitting and receiving part has an electromagnetic radiation source (5) and a concave main reflector (3) which is common to transmission and reception. The transmitting and receiving part has a second reflector (6), which is positioned between the radiation source (5) and the main reflector (3), so that this second reflector shades a part of the main reflector reflecting area (4) for the radiation transmitted by the radiation source towards the main reflector. This forms a shadow area (17) on the main reflector reflecting area for transmitted radiation. This second reflector receives a part of the reflected radiation from the main reflector and reflects this back towards a detector for reception of the radiation. The shadow area for transmitted radiation also has a reflecting receiving area for the radiation which is incident upon the main reflector and reflected back towards the detector by the second reflector. The remaining part of the main reflector reflecting area, which is not shadow area for transmitted radiation, forms a transmitting area for the radiation which is transmitted by the radiation source and reflected in the main reflector.
    • 发射和接收电磁辐射的安排。 发送和接收部分(1)发送和接收电磁辐射,并且反射部分(2)在通过透射辐射的介质的同时将发射的电磁辐射反射回发射和接收部分。 发射和接收部分具有发射和接收共同的电磁辐射源(5)和凹主反射器(3)。 发射和接收部分具有位于辐射源(5)和主反射器(3)之间的第二反射器(6),使得该第二反射器遮蔽主反射器反射区域(4)的一部分,用于 由辐射源向主反射器辐射的辐射。 这在透射辐射的主反射器反射区域上形成阴影区域(17)。 该第二反射器接收来自主反射器的反射辐射的一部分并将其反射回用于接收辐射的检测器。 用于透射辐射的阴影区域还具有用于辐射的反射接收区域,入射到主反射器并通过第二反射器反射回检测器。 主反射器反射区域的其余部分(其不是用于透射辐射的阴影区域)形成用于由辐射源透射并在主反射器中反射的辐射的透射区域。