Abstract:
A contamination detection apparatus is provided for measuring an amount of contamination on an optically transmitting element or pane. The optically transmitting element is capable of transmitting electromagnetic radiation. The contamination detection apparatus includes a contamination detection (CD) radiation source for providing a source intensity of radiation. The source intensity or radiation passes through the optically transmitting element at least one time. A reference detector is also provided for detecting the source intensity of radiation, and the reference detector has a reference output level that is representative of the source intensity.
Abstract:
A close contact type image sensor having an improved structure and manufacturing process utilizes a body having integral reflective surfaces to eliminate assembly steps. The body and reflective surfaces are formed using different plastic materials in a single injection molding process. A material having highly reflective characteristics is used for the reflective surfaces. A light source is aligned with the reflective surface by pins in the sensor body which are inserted into holes in the light source. Alternatively, the light source can be mounted on a printed circuit board which has holes that are aligned with the pins. A self focusing lens is mounted in the body to focus reflected light onto a light detector which is mounted on a printed circuit board. A transparent cover piece is mounted in an opening in the body. Flat spring clips secure the printed circuit board to the body of the sensor.
Abstract:
A plate scanning device for measuring diffused or reflected light is provided. The plate scanning device includes a longitudinally extending silicon sensor strip and at least one light source extending substantially parallel to the sensor strip. Adjustably mounted light funnels form an aperture therebetween for receiving light reflected from a printing plate. The aperture has a width and length which is slightly smaller than a width and length of the sensor strip.
Abstract:
In accordance with the teachings of the present invention, a light sensing detector assembly (10) having integral fiber optic light transmission strands (16) is provided. The light sensing detector assembly (10) includes a quadrant detector (12) having a plurality of apertures (14) extending therethrough and a photosensitive surface (20) that generates photocurrents in response to exposure to light. The plurality of fiber optic strands (16) each have a first end (18) and a second end (22). The first ends (18) extend through the plurality of apertures (14) and outwardly from the photosensitive surface (20). A light source (26) projects light onto the second ends (22) of the plurality of fiber optic strands (16) such that the light is transmitted through the plurality of fiber optic strands (16) towards a reflective workpiece (50). The light reflected from the workpiece (50) in turn impinges upon the photosensitive surface (20).
Abstract:
An optical proximity sensor generates information indicative of a distance to an object in a field and in some embodiments also generates information indicative of a spectral reflectance characteristic of the object. The information indicative of the spectral reflectance characteristic can be used to determine whether the object in the field is a living plant or another object such as soil. Light emitted from the optical sensor for reflection off the object is modulated so that reflected light from the optical sensor can be discriminated from reflected ambient sunlight. The optical sensor is scanned over the field to map objects in the field and/or to determine the location of rows of crop plants. A sensor in accordance with the present invention has many uses in agriculture including spraying, cultivation and vehicle guidance.
Abstract:
An optical probe for simultaneously detecting radiation emitted from a plurality of different areas of a device. The probe includes a plurality of optical signal acquisition devices. Each of the optical acquisition devices is formed from at least one optical fiber strand having a terminal end portion. The probe includes a hollow longitudinal member with an outer surface having a length and a perimeter perpendicular to the length. The outer surface has a plurality of openings disposed at intervals about the perimeter of the outer surface. Each of the plurality of openings has a different one of the terminal end portions from one of the optical acquisition devices disposed therein. Each of the optical acquisition devices has a different optical field of view corresponding to one of the plurality of different areas of the device.
Abstract:
A method and apparatus for monitoring the condition of an electrical generator formed of a stator core punching assembly having a plurality of winding slots for receiving a plurality of generator windings. The plurality of winding core slots lie along an interior cylindrical surface of the stator core punching assembly, and the stator core punching assembly has an outer cylindrical surface opposite the interior cylindrical surface. The stator core punching assembly also has a plurality of internal vent openings extending from the outer cylindrical surface toward the inner cylindrical surface. A first optical probe is disposed outside of the stator core punching assembly and is formed of a plurality of optical acquisition devices each of which is formed from at least one optical fiber strand. Each of the optical acquisition devices is disposed to acquire light generated at one of the winding slots and passing through one of the internal vent openings.
Abstract:
The device according to the invention concerns a device for measuring the spatial characteristics of a light source (2) by means of a light-processing apparatus. The device includes a deformable light guide (4) intended to receive, at one of its ends (4.sub.1), the light passing through a movable optical system (5) for examining the light source (2) and transmitting the light, at the other one of its ends (4.sub.2), to a fixed optical system (8) for gathering and transmitting the light to the processing apparatus (3).
Abstract:
A photometering apparatus for measuring the brightness of an object to be photographed, includes a condenser lens having at least one aspheric lens surface for condensing a bundle of rays reflected from the object. A diaphragm is provided at a predetermined distance behind the condenser lens with respect to the object, and a split type light receiving device is provided behind the diaphragm to receive light which passes through the diaphragm. These elements satisfy the condition represented by the formula 0.3.ltoreq.L.sub.ASP /T.sub.L .ltoreq.0.7, wherein "T" represents the distance between the surface of the condenser lens nearer to the object to be photographed and the light receiving device, and wherein "L.sub.ASP " represents the reduced distance between the aspheric surface of the condenser lens and the diaphragm. The term "L.sub.ASP " is defined by the relationship L.sub.ASP =(d.sub.L /N)+d.sub.s, wherein "d.sub.L " represents the thickness of the lens, "d.sub.s " the distance between the diaphragm and the surface of the lens nearer to the image, and "N" the refractive index of the lens at the e-line.
Abstract:
A simple device for collecting a greater amount of fluorescent emission from a minute sample in a capillary column. An axially symmetrical paraboloid reflector is implemented to collect fluorescent emission from the capillary column. The reflector also serves as a simple bracket for positioning and aligning the capillary column. Fluorescent emission is collimated by the paraboloid reflector which allows more effective use of band pass filters in blocking scattered radiation from detection. The scattered and transmitted radiation can be used to facilitate alignment of the capillary with respect to the detection optics. The paraboloid reflector also facilitates the implementation of simultaneous multiple-channel detection.