ENERGY-RECORDING MICRODENSITOMETER
Abstract
An inverse densitometric circuit is described which employs the technique of voltage transfer curve translation to provide a direct linear measure of photographic energy profiles. An antilog D scale (reciprocal transmittance scale) linear to + or - 0.05 antilog D units over a basic antilog D range of 12 is obtained. Neutral-density filters are used to compound the basic sensitivity increment and obtain a total light level range in excess of 1 to 1000. An optical system which provides an insrument resolving power of 500 lines/mm is described. (Athor)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 26, 1961
- Accession Number
- AD0268587
Entities
People
- A.b. Hook
- F. Mastrup
- L.f. Gillespie
Organizations
- United States Army Engineer Research and Development Laboratory