HIGH-SPEED VIBRATION-FREE SHUTTER
Abstract
The design and development is reported of a high-speed in-between-lens shutter free from vibration. Any vibration, either internally within the camera or transmitted to the camera from the air-frame tend to deteriorate the picture quality. Shutters of the required size (3 1/2 in. free aperture) which exist at present do not meet this specification, because heavy masses are moved and springs are employed. The shutter uses continuously rotating discs in main- and sub-assemblies with properly positioned cut-outs. The drive-connections between motors and gear-trains are effected by a recently developed highly elastic slip-free belt. The shutter assembly is connected to the camera housing by means of an elastic suspension. The results obtained on the experimental model with photographic tests show the following: A comparison was made between test photographs with the shutter at stand-still, fully open and the whole mechanism operating. The resolution values are the same on both test exposures. This indicates that there is no deterioration caused by shock, vibration or other factors. Independent electronic vibration tests were conducted to verify the photographic results. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 06, 1962
- Accession Number
- AD0272255
Entities
People
- H. Kilfitt