37 results about "Diffuse radiation" patented technology

A fiber optic connector for coupling focused radiant energy from a laser to a fiber optic conductor includes a secondary transmission path, one or more diffusers and, optionally, one or more internal heat sinks for diffusing radiant energy so as to and thereby minimize damage to the connector. In addition, coupling of the radiant energy to the cladding of the fiber is minimized by stripping or at least partially removing the cladding to reduce the amount of cladding in the area that extends to the focal plane of the radiant energy source, while reduction of higher order propagation modes may optionally be achieved by tapering a section of the fiber in such a manner that light entering the fiber at large critical angles are effectively collimated, i.e., bent towards the axis of the fiber.

A probe style radiometer includes a generally rectangular cross-sectional body and a probe having a square cross-section. The probe is preferably a hollow rod having a tip equipped with a UV-collecting aperture and a mirror. The mirror reflects UV light entering the aperture down the length of the rod to a detector in the body. A processor in the body then computes the amount of UV radiation based on signals from the detector. The amount may then be provided on a display integrated into the body. A ground quartz or glass window may be provided at the tip to seal the rod from exterior contamination and to diffuse the incoming UV radiation in a manner that will give the probe a near-cosine angular response. Filters within the radiometer body then filter this diffused radiation to the spectral region of interest. Preferably, the radiometer is battery powered and includes switches on the body to allow a user to control the mode of operation. To prevent electrical shock, the metal rod of the probe may contain an electrically non-conductive outer coating.

A probe style radiometer includes a generally rectangular cross-sectional body and a probe having a square cross-section. The probe is preferably a hollow rod having a tip equipped with a UV-collecting aperture and a mirror. The mirror reflects UV light entering the aperture down the length of the rod to a detector in the body. A processor in the body then computes the amount of UV radiation based on signals from the detector. The amount may then be provided on a display integrated into the body. A ground quartz or glass window may be provided at the tip to seal the rod from exterior contamination and to diffuse the incoming UV radiation in a manner that will give the probe a near-cosine angular response. Filters within the radiometer body then filter this diffused radiation to the spectral region of interest. Preferably, the radiometer is battery powered and includes switches on the body to allow a user to control the mode of operation. To prevent electrical shock, the metal rod of the probe may contain an electrically non-conductive outer coating.

In a method for measuring the size or shape of an edge of a machined work piece or of a cutting edge of a tool, the surface of the edge is illuminated by diffused radiation from several positions in the vicinity to the edge by an illumination arrangement, and a picture of the edge is reproduced by recording reflected radiation from the illuminated edge by means of a picture reproduction unit.

An apparatus for tomosynthesis and / or mammography includes: an X-ray detector, for receiving and detecting X-rays in a first, detection plane; an X-ray source, which can be activated individually and is positioned to emit a corresponding X-ray beam towards the first, detection plane; a processing and control unit, for activating the X-ray source and receiving a signal relating to X-rays which passed through the breast and were detected by the detector to derive a radiographic image representative of the internal structure of the breast; a grille for removing diffuse radiation, interposed between the source and the detector to receive X-rays which passed through the breast. The grille including plates positioned opposite the chest of the patient when the breast is positioned in a positioning region, and which are angled to converge towards the same region proximal to the X-ray source.

The invention discloses a conveyor belt longitudinal tear detecting method based on metal film diffuse reflection, and belongs to the technical field of conveyor belt online detection of coal mine enterprises. The conveyor belt longitudinal tear detecting method is characterized by being a detecting method for conveyor belt longitudinal tear by utilizing a physical property that infrared-ray reflectance of the metal film is 5 times that of a black adhesive tape and combining an infrared-ray CCD (charge coupled device) camera image detecting technology of a metal film. Infrared rays emitted by an area array infrared-ray light source used by the method cover half of the area of an adhesive tape; after the infrared rays generate diffuse radiation on the outer surface of a frosted metal tin film, one part of reflection signals are received by a CCD camera so as to draw out a surface condition figure of the half of the adhesive tape; by virtue of the design, less normal hardware equipment is utilized to realize wide-range and highly-real-time longitudinal tear early warning of a conveyor adhesive tape, so that purchasing and operation cost of the equipment is controlled within an acceptable range of the enterprises, and a misjudgment rate of an image analysis system to the adhesive tape outer surface state can be controlled to be lower than 10%.

The invention relates to a high-precision sun exposure sensor and a measuring method thereof. The high-precision sun exposure sensor comprises a first photoelectric tube, a second photoelectric tube and a third photoelectric tube which are arranged in a coaxial mode. A shading cylinder is provided with upper portion incidence windows and lower portion incidence windows, wherein the upper portion incidence windows are evenly and symmetrically distributed on the upper portion of the shading cylinder, the lower portion incidence windows are evenly and symmetrically distributed on the lower portion of the shading cylinder, the number of windows included in the upper portion incidence windows is consistent with that of windows included in the lower portion incidence windows, and the windows of the upper portion incidence windows and the windows of the lower portion incidence windows are distributed on the shading cylinder in a staggered mode so that diffuse radiation received by the second photoelectric tube through the upper portion incidence windows and diffuse radiation received by the third photoelectric tube through the lower portion incidence windows can be even and consistent. The high-precision sun load sensor and the measuring method of the high-precision sun load sensor can effectively improve measurement accuracy of direct solar radiation, accordingly improve sunshine duration measurement precision, especially improve the sunshine duration measurement precision to the largest extent on cloudy and semi-cloudy meteorological conditions, and are wide in application range, safe, and reliable.