Abstract:
A photographic process in which multiple low-intensity, discrete light flashes are used to expose a photographic emulsion in order to mitigate the formation of spurious exposed areas in the image which are produced by a single, high-intensity flash exposure. Improved resolution also results from the multiple flash process.
Abstract:
A SELECTIVELY OPERATIVE RELAY LENS IS PROVIDED IN AN OPTICAL SYSTEM WHICH IS PART OF APPARATUS THAT DETERMINES THE POSITIONAL AND ANGULAR ORIENTATION OF AN OBJECT WITH RESPECT TO A GIVEN REFERENCE SYSTEM. WHEN THE RELAY LENS IS INOPERATIVE, THE OPTICAL SYSTEM PROVIDES AN IMAGE THAT IS INDICATIVE OF THE POSITION OF THE OBJECT RELATIVE TO TWO PREDETERMINED REFERENCE AXES OF THE REFERENCE SYSTEM AND THE ANGULAR ORIENTATION OF THE OBJECT RELATIVE TO A THIRD REFERENCE AXIS OF THE SYSTEM, THE THREE REFERENCE AXES BEING MUTUALLY ORTHOGONAL WITH RESPECT TO EACH OTHER. WHEN THE RELAY LENS IS OPERATIVE, THE OPTICAL SYSTEM PROVIDES AN IMAGE WHICH IS INDICATIVE OF THE ANGULAR ORIENTATION OF THE OBJECT RELATIVE TO THE FIRST TWO MENTIONED REFERENCE AXES.
Abstract:
A spectrum analyzer is disclosed which is of the type that utilizes an electrically scannable array of optical detectors. The array is selectively illuminated, i.e. irradiated, by at least two portions of a spectral band image of radiation. One of the portions is associated with a first spectral range and the other portion is associated with a second spectral range. The first and second ranges include mutually exclusive first and second spectral components, respectively, and a common third spectral component which is intermediate of the other two components. The detectors are calibrated by means which include a pair of optical filters. One of the filters is a single narow band transmission which has a transmission characteristic corresponding to one of the three aforementioned spectral components. The other filter is a double, i.e. two, narrow band transmission filter which has a transmission characteristic corresponding to the other two spectral components. In this way, the number of calibrating filters used in the system during the calibration mode is minimized and simplified than would otherwise be the case if a separate filter for each of the three spectral components were to be utilized.