Patent · US Active

Haze reduction method and apparatus for use in retinal imaging

US7830424B2 · kind B2 · utility

0Cited by
8References
17Claims
0Family size

Inventor

Key dates

Filing dateSep 30, 2005
Grant dateNov 9, 2010
Priority date—
Expiry dateSep 27, 2028

Classification

  • Technology area (CPC A)Human Necessities
  • CPC primaryA61B3/145
  • WIPO fieldMedical technology
  • WIPO sectorInstruments

Abstract

Driver current in digital retinal image transfer is significantly reduced for retinal cameras for reducing heat-induced dark current and resultant haze. In one embodiment line drivers are used whose current draw does not depend on data rate or frequency to eliminate the problem of high data rates creating high driver current draw. In a second embodiment the 14-MHz clock driver is inhibited by interrupting its free-running clock pulse input until such time as one wishes to output a picture from the retinal camera, at which time the clock driver draws only a quick burst of current. The result is much lower overall clock driver current draw, less heat, less dark current and less haze.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.