Exposure anticipation circuit
US4754470A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1986 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Feb 10, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/60
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus for reducing delay times between successive x-ray images in a medical x-ray diagnostic system in which delay times are a function of the time required to transport film in a camera apparatus. The camera is used to record images on an image display apparatus. The delay time is reduced by determining the time at which an image on the apparatus will reach a predetermined intensity level and initiating the camera film transport cycle at a predetermined time prior to the image reaching the predetermined intensity level. Apparatus is disclosed for determining the rate of image development and for providing a signal to initiate the camera film transport at a fixed time prior to completion of image development regardless of the rate of image development. The predetermined time period is selected such that actual film motion is not initiated until the image is fully developed on the image display apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.