Expansion Technique for Cary 14 Transittance Measurements.
Abstract
The expansion feature of the transmittance (T) slidewire on the Cary Model 14 spectrophotometer, 0 to 1% T Full Scale, provides an extremely useful technique to measure the magnitude of small, yet significant energy leaks (< 1% T) of sidesbands in interference filters. Of the several optical materials investigated, the optical wedge provided to be the best component to establish the 0 to 1% T range. It is insensitive to temperature changes, has excellent shelf life, is commercially available at a reasonable cost, and can be used over a wide wavelength range. In a test with a neutral density filter, good agreement existed between the values from the 0 to 1% T range and from the 0 to 100% T and 0 to 10% T ranges. The expansion technique takes advantage of the excellent photometric accuracy of the spectrophotometer by providing an improved readability of chart values. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1971
- Accession Number
- AD0883290
Entities
People
- A. L. Olsen
- L. W. Nichols
Organizations
- Naval Air Weapons Station China Lake