Richard L Albrecht

US Patent:

7697060, Apr 13, 2010

Filed:

Jan 30, 2006

Appl. No.:

11/344452

Inventors:

Douglas Kreysar - Duvall WA, US
Matthew Lekson - Woodinville WA, US
Ronald F. Rykowski - Woodinville WA, US
Richard E. Albrecht - Chapel Hill NC, US

Assignee:

Radiant Imaging, Inc. - Duvall WA

International Classification:

H04N 5/238

US Classification:

348368, 348362, 348367, 396452

Abstract:

Rotary shutter assemblies for imaging photometers and methods for using such shutters are disclosed herein. In one embodiment, for example, a method for capturing an image with an imaging photometer can include positioning a rotary shutter having an aperture at a first position such that the shutter blocks light traveling along an optical axis from a light source being measured to an image sensor of the photometer. The method can include pivotably moving the shutter at a generally constant angular speed to a second position with the aperture aligned with the optical axis to expose at least a portion of the image sensor to the light for a first predetermined exposure time. After exposing each portion of the image sensor to the light for the first exposure time, the method can include pivotably moving the shutter at the angular speed to a third position such the aperture is not aligned the optical axis, and then pivotably moving the shutter from the third position back to the first position without rotating the shutter 360 degrees.

US Patent:

7907154, Mar 15, 2011

Filed:

Jun 4, 2003

Appl. No.:

10/455146

Inventors:

Ronald F. Rykowski - Woodinville WA, US
Richard E. Albrecht - Chapel Hill NC, US

Assignee:

Radiant Imaging, Inc. - Duvall WA

International Classification:

G09G 5/10

US Classification:

345690, 345 11

Abstract:

The present disclosure provides methods and apparatuses for on-site calibration of a visual display sign. In one exemplary implementation of the invention, an imaging device captures image data from a visual display sign. The imaging device can include a CCD digital camera and optics for long-range imaging. The captured image data is sent to an interface that compiles the data. The interface then calculates correction factors for the image data that may be used to achieve target color and brightness values for the image data. The interface then uploads the adjusted image data back to the visual display sign.

US Patent:

8482652, Jul 9, 2013

Filed:

Mar 26, 2010

Appl. No.:

12/748035

Inventors:

Douglas Kreysar - Redmond WA, US
Ronald F. Rykowski - Bellevue WA, US
Richard E. Albrecht - Cumming GA, US

Assignee:

Radiant Imaging, Inc. - Redmond WA

International Classification:

H04N 5/217
H04N 5/238

US Classification:

348335, 348341, 348367, 3482111, 359290, 359322

Abstract:

The present disclosure is directed to imaging device, systems, and methods for collecting optical data for use with spectrometers. An imaging device configured in accordance with one aspect of the disclosure includes a lens configured to introduce light into the imaging device along an optical path, and an image sensor spaced apart from the lens and configured to receive at least a portion of the light along the optical path. The imaging device further includes a filter assembly positioned between the lens and the image sensor, and a reflector or mirror carried by the filter assembly. The filter assembly is configured to move the reflector between first and second positions. In the first position the reflector is at least partially aligned with the optical path and reflects at least a portion of the light to a corresponding light input for a spectrometer. In the second position the reflector is positioned outside of the optical path.

US Patent:

60956682, Aug 1, 2000

Filed:

Jun 19, 1996

Appl. No.:

8/665888

Inventors:

Ronald F. Rykowski - Woodinville WA
Richard E. Albrecht - Durham NC

Assignee:

Radiant Imaging, Inc. - Duvall WA

International Classification:

F21V 700

US Classification:

362350

Abstract:

A visual display sign having a lighting unit that provides high-efficiency light output from a non-point source of light. The reflector in the lighting unit is sealed and has a shaped reflecting surface obtained by generating a curve from a set of predetermined curve reference points. The shaped reflecting surface provides a light output efficiency of about 60 percent from a non-point source of light and spreads the emitted light about eight degrees from the plane of circumference of the reflector. The lighting units are attached to the visual display sign at a downward angle of about eight degrees from the horizontal.

US Patent:

59347953, Aug 10, 1999

Filed:

Jun 19, 1996

Appl. No.:

8/665889

Inventors:

Ronald F. Rykowski - Woodinville WA
Richard E. Albrecht - Durham NC

Assignee:

Radiant Imaging, Inc. - Duvall WA

International Classification:

F21V 1304

US Classification:

362309

Abstract:

The present invention comprises a lighting unit having a light source emitting light, a reflector placed behind the light source for reflecting the emitted light, and a lens held in front of the light source. The lens is substantially flat and circular. The lens has a predetermined structure that comprises a light-emitting surface and a light-incident surface opposing the light-emitting surface. The light-incident surface of the lens is formed into a vertically oriented high-frequency waveform. In the first embodiment of the lens, the light-emitting surface is substantially flat and the high-frequency waveform is obtained from a combination of a first primary waveform and the third harmonic of the first primary waveform; that is, the high-frequency waveform is derived from the equation ##EQU1## The first embodiment of the lens spreads the emitted light with a graduated distribution horizontally about 20 degrees as measured from the edge of the lens. In the second embodiment of the lens, the light-emitting surface is formed into a vertically oriented low-frequency waveform derived from the equation ##EQU2## The light-incident surface is formed into a vertically oriented high-frequency waveform obtained from a combination of a second primary waveform and the third and fifth harmonics of the second primary waveform. That is, the high-frequency waveform of the second embodiment is derived from the equation ##EQU3## The second lens embodiment spreads the emitted light with a graduated distribution horizontally about 45 degrees as measured from the edge of the lens.