Reader card for densitometric test analysis
US4568184A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1983 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | Apr 8, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/5911
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A reader card for use in densitometric test analysis wherein a film having data recorded as spots thereon is supported by and retained on a base card, the reader card further having an area for use in establishing initial conditions for the optical system of the densitometer and a series of borders for indicating the relative position of the film on the card to the optical system of the densitometer. In a preferred embodiment, the reader card includes a base card having an opening therethrough, and an overlay thereover. The overlay retains the film in place and includes a black band covering the film, the black band having windows therethrough for observing and measuring the spots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.