Abstract: An apparatus for determining a thickness profile of a moving material having at least two optical interfaces. A transport apparatus transports a length of moving material at a predetermined flatness through a measurement region. A recessed track disposed in the channel provides an area of non-contact in the measurement region. An interferometer apparatus collects a portion of a beam of light reflected from the optical interfaces of the moving length and generates an interference signal representative of the collected light. An analyzer then analyzes the interference signal to determine a thickness profile of the material in the first direction.

Abstract: Data is recorded on the film by the manufacturer prior to exposure at a first magnetic head azimuth angle. The camera magnetically records information on the film frame-by-frame at a second head azimuth angle with each exposure or shortly thereafter. Before exposure of any frame, the camera determines whether the frame has already been exposed by sensing the recorded signal amplitude at one of the two magnetic head azimuth angles. In order to prevent a double exposure, the camera transports the film past any frame having data magnetically recorded therein corresponding to the second azimuth angle.

Abstract: Magnetic recording apparatus for photographic still camera comprises a magnetic head mounted on a film platen to contact a magnetic coating on the film. A pressure pad on the opposite side of the film urges the film into contact with the head. The head is inclined transversely of the film to conform to the transverse film curl and is provided with angled surfaces to provide for better wrap of the film around the head and easier threading.

Abstract: A still camera comprised of a dual, normal and telephoto, lens with flash, incorporates features which allow controlling several camera functions with a single sliding multi-position flash housing. Position "normal" configures the camera so that the viewfinder has a normal field of view, the flash is unextended, and an objective lens of normal focal length is in exposure position. Position "tele" configures the camera so that the viewfinder has a narrow field of view, a telephoto lens is in exposure position, and the flash is fully extended. Additional positions of the flash housing and lens and viewfinder are also disclosed.