Louis V. Genco - Enon OH Harry L. Task - Dayton OH
Assignee:
The United States of America as represented by the Secretary of the Air Force - Washington DC
International Classification:
A61B 310 A61B 302
US Classification:
351221
Abstract:
A novel optical device and method for measuring intraocular light scatter in a human vision system of a subject is described which comprises first and second light sources of respective predetermined intensities, the images of which are optically folded along a common optical axis and projected into the vision system of the subject, the first source being of intensity sufficient to generate intraocular haze in the vision system of the subject, the second source being movable in a plane substantially perpendicular to the axis along which its image is projected whereby the second source image as viewed by the subject may be selectively viewed with respect to the first source image to measure the apparent peripheral extent of the haze surrounding the first source image.
System For Measuring Angular Deviation In A Transparency
Harry L. Task - Dayton OH Louis V. Genco - Enon OH Kenneth L. Smith - Dayton OH Albert G. Dabbs - Dayton OH
Assignee:
The United States of America as represented by the Secretary of the Air Force - Washington DC
International Classification:
G01N 2188
US Classification:
356239
Abstract:
An improved system for measuring absolute angular deviation through transparencies, such as aircraft windscreens, uses an incoherent light source and a target configuration in the form of an opaque slide with a transparent "L"-shaped pattern. The positions of images of the legs of the "L" passed through the transparency are detected by CCD arrays for measurement of the azimuth and elevation components of angular deviation for each tested point on the transparency, uncontaminated by lateral displacement errors.
Method Of Measuring Optical Properties Of A Transparency
Louis V. Genco - Enon OH Harry L. Task - Dayton OH
Assignee:
The United States of America as represented by the Secretary of the Air Force - Washington DC
International Classification:
G01B 900
US Classification:
356125
Abstract:
A method of measuring optical properties of a transparency uses a video camera for focusing and then refocusing an image of a point source of light transmitted through a test region when the transparency is first absent and then later present at the test region. The distance the camera needs to be moved together with the focal length of a focusing lens used in carrying out the method provide sufficient quantitative data to calculate the spherical optical power of the transparency. Also, the camera generates video images of the point source both before and after the transparency is present in the test region. These images are displayed on a screen containing a grid pattern which facilitates measurement of the displacement of the image from the center of the grid or from the optical axis due to the presence of prismatic deviation in the transparency. Given the earlier data and supplemented by the latter displacement quantity, the prismatic deviation of the transpareny can also be calculated.
Method For Dynamically Recording Distortion In A Transparency
Harry L. Task - Dayton OH Louis V. Genco - Enon OH
Assignee:
The United States of America as represented by the Secretary of the Air Force - Washington DC
International Classification:
G01N 2100
US Classification:
356239
Abstract:
A method for dynamically recording distortion in a transparency includes a support fixture for mounting the transparency for movement about a predetermined horizontal or vertical axis, with a camera disposed in back of the transparency while a test target is disposed in front of it. The test target has a plurality of small light sources arranged in a rectangular matrix pattern toward which the camera is aimed through the transparency. By opening the camera shutter for a period of time as the transparency is moved through a predetermined angle, a photographic record of distortion at a plurality of regions in the transparency is produced.
Harry L. Task - Dayton OH Louis V. Genco - San Antonio TX
Assignee:
The United States of America as represented by the Secretary of the Air Force - Washington DC
International Classification:
A61B 302
US Classification:
351243
Abstract:
A novel vision tester and vision testing method is described which comprises a pair of translucent displays, each transilluminated by electroluminescent lighting panels, the images of the two patterns being superimposed to provide a combined image characterized by a pattern of variable contrast. Light sensors near each light panel provide a measure of the relative intensities of the two images, which provides a measure of the contrast of each combined image. Contrast may be directly read out by processing the signals from the light sensors. The tester may be battery powered for portability.
Contrast Sensitivity Function Measurement Chart And Method
Harry L. Task - Watertown MA Louis V. Genco - San Antonio TX
International Classification:
A61B 302
US Classification:
351239
Abstract:
A novel device and method for determining the contrast sensitivity of a subject is provided and comprises a test chart including a plurality of patches systematically organized in a predetermined array, each patch having a plurality of adjacent patterned areas, at least one of which is a pattern of alternate light and dark regions of predetermined contrast, and the remaining patterned areas are solid gray patterns of predetermined reflectance, each contrast pattern being characterized by a space average reflectance equal to the predetermined reflectance value of the adjacent gray patterned areas. The spatial frequency and contrast of the alternate dark and light regions may be varied in the array of patches. In the method for determining the visual contrast sensitivity of the vision system of a subject, a chart of the invention is displayed to the subject at successively shorter distances, and the greatest distance at which the subject can resolve each contrast pattern is determined and recorded.
Louis V. Genco - Enon OH Harry L. Task - Montgomery County OH
Assignee:
The United States of America as represented by the Secretary of the Air Force - Washington DC
International Classification:
G01N 2141
US Classification:
356128
Abstract:
An apparatus for analyzing the deleterious characteristics of optically transparent bodies, including distortion, multiple imaging and birefringence. A beam of light is projected along an optical axis onto a beam splitter. The reflected segment passes through the transparent body and is then reflected back along nearly the same path toward the beam splitter by a retro-reflective screen lying at the image plane of the beam. The portion of the reflected beam passing directly through the beam splitter is detected by an optical sensor in substantial orientation with the axis of the beam reaching it. Distortions and multiple imaging are detected by shape changes and images, respectively, in a pattern of opaque areas superimposed on the originating beam. Birefringence is analyzed by polarizing the originating beam and observing the color pattern and intensity reaching the sensor.
Harry L. Task - Dayton OH John F. Courtright - San Antonio TX Louis V. Genco - Enon OH
Assignee:
The United States of America as represented by the Secretary of the Air Force - Washington DC
International Classification:
B64D 3900
US Classification:
244135A
Abstract:
An improved aerial refueling system, suitable for operation under nighttime or other limited visibility conditions, is described, and comprises a tanker aircraft with refueling boom depending rearwardly thereof, a receiver aircraft having a fuel receptacle for interconnection with the boom, means disposed on the tanker for illuminating the receiver aircraft with infrared light during hookup and refueling, infrared sensitive viewing means and an optical imaging device on the tanker through which the boom operator may view the boom and receiver aircraft to guide the boom into position for connection with the receiver aircraft.
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