Abstract
A pneumatic heat detector is described in which radiant energy is dissipated in a black absorber which is located in the center of a gas cell. The resulting heating and expansion of the gas serves to distort a collodion film located a few thousands of an inch from a nearby parallel glass window. The distortion of the film is detected by observing a shift in a system of interference fringes formed by light reflected from the film and the adjacent glass surface. The principle lends itself readily to the design of systems comprising a multiplicity of heat cells and associated detecting films. A system utilizing 61 cells is described.
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Published version (
Free)
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
