Abstract:
A photodetector for detecting photo intensity through a liquid comprises a body (15), which defines a chamber (17) that is open at one end, a photosensor (14) mounted to the body and arranged to sense light entering the chamber (17) through its open end, a layer of air being disposed in the chamber between the photosensor and the open end of the chamber. The layer of air forms a barrier between the photosensor (14) and the liquid and thus slime and other matter is unable to build up in front of the photosensor.
Abstract:
An irradiation field-limiting apparatus connected to an X-ray-generating apparatus includes a pair of first limiting blades defining a width of an opening through which radiation is to pass; a first opening width-adjusting mechanism including a first opening width-adjusting shaft operable to adjust the width of the opening by moving the pair of first limiting blades toward or away from each other; and a first opening center-adjusting mechanism including a first opening center-adjusting shaft operable to adjust a center position of the opening by moving the pair of first limiting blades in a same direction. The first opening width-adjusting shaft and the first opening center-adjusting shaft are coaxially arranged.
Abstract:
An infrared light detecting device and the infrared detecting method thereof. The device comprises a shield, a first photo detector and a second photo detector. The shield for blocking light is located above the first photo detector and the second photo detector. An opening is disposed on the shield above the first photo detector. In addition, there is a gap arranged between the first photo detector and the second photo detector. The first photo detector can detect the light passing through the opening to generate a photo sensing signal and couple an infrared light signal in the photo sensing signal to the second photo detector in order to output the infrared light signal.
Abstract:
An adjustable aperture device for an electromagnetic radiation detecting apparatus includes a position adjustment body configured for adjusting a position of a selected aperture hole of multiple selectable aperture holes, where electromagnetic radiation propagates through the selected aperture hole. The adjustable aperture device further includes a guide unit configured for guiding the position adjustment body along a predefined guide direction, and an aperture body defining the aperture holes and including multiple engagement sections, where the adjustment body is engagable in a selectable one of the engagement sections to thereby select the selected aperture hole. The adjustable aperture device further includes a pre-loading element configured for pre-loading the position adjustment body towards the aperture body, and a drive unit configured for driving the aperture body to move so that the position adjustment body is engaged in a respective one of the plurality of engagement sections.