 Ion implant apparatus |
| OF THE INVENTION FIG. 1 shows a wafer anti-static device of an ion implant apparatus according to ... |
|
| Method of and apparatus for establishing highlight and shadow densities |
| The present invention is directed to a method of and an apparatus for establishing a gradation ... |
|
| Electronic measurement system |
| I claim: 1. Measurement apparatus, comprising: switch means having ON and OFF states; first counter ... |
|
| Clinical thermometer with thermo-couple probe |
| I claim: 1. An electrical clinical thermometer comprising display means for indicating a sensed ... |
|
| Thermometer using a thermo-sensitive element |
| Accordingly, an object of this invention is to provide a thermometer using a thermo-sensitive ... |
|
| Opposed button thrust surfaces for earth boring bits |
| In this invention, each of the thrust shoulders contains a plurality of wear resistant buttons. T... |
|
| Liquid crystal display device with light shield of specific transmittance |
| It is an object of the present invention to solve the above-mentioned problem. The present ... |
|
| Liquid crystal variable color density lens and eye protective devices incorporating the same |
| Accordingly, it is an object of the invention to provide a sunlight protective optical device that ... |
|
| Apparatus and method for color transformation |
| The present invention seeks to provide a color transformation apparatus and technique which require ... |
|
|
Method of and apparatus for adjusting an image intensifier chain
| Details |
Inventors: Proper, Johannes; Schuur, Jacob; Monte, George L. A.; Westerveld, Eduard P.;
Assignee: U.S. Philips Corporation (New York, NY)
Primary Examiner: Griffin; Robert L.
Assistant Examiner: Coles; Edward L.
Attorney, Agent or Firm: Briody; Thomas A., Mayer; Robert T., Haken; Jack E.
The light which is emitted from the output screen of an image intensifier and passed through a subsequent output objective, is converted into an electrical signal by means of a photomultiplier tube or an image pick-up tube. The noise or modulation content of the electrical signal are measured. An optimum adjustment of the focussing position of the output objective and the magnitude of the focussing voltage applied to the imge intensifier, cause the noise or modulation content to attain an extreme value, e.g. a maximum. The focussing voltage and the focussing position of the output objective are iteratively adjusted. |
|
DETAILED DESCRIPTION What is claimed is: 1.
A method of adjusting an image intensifier to obtain an optimum adjustment at least of a focussing voltage applied to the image intensifier comprising the steps of exposing the input screen of the image intensifier to input radiation, converting light originating from at least a portion of the output screen of the image intensifier into a first electrical signal, sensing the difference between said first signal and a reference value and adjusting said focussing voltage until said difference attains an extreme value.
2.
A method as claimed in claim 1, for obtaining an optimum adjustment of both the focussing voltage and the focussing adjustment of an output objective located beyond the output screen of the image intensifier by iteration, in which the difference between the first signal and the reference value is adjusted to an extreme value during each of a plurality of iterations.
3.
A method as claimed in claim 1, in which the input radiation is modulated as a function of location, and the output light thus produced is converted into a first signal which is amplitude modulated as a function of time.
4.
Apparatus for carrying out the method claimed in claim 1 including an image pick-up tube, means for transferring the image on said output screen to said image pick-up tube, a non-linear amplifier arranged to amplify the output of said pick-up tube, an integrator which is connected thereto and an indicator for indicating the output of said integrator.
5.
A method as claimed in claim 1 in which a noise signal is filtered from the first signal and adjustment is carried out until the absolute amplitude of said noise signal is maximized.
6.
A method as claimed in claim 5, in which the noise signal is modified in a non-linear manner and is subsequently integrated.
7.
A method as claimed in claim 1 in which the input radiation is modulated as a function of location and of time, and the light output thus produced is converted into an amplitude modulated first signal
|
| Related patents |
|
|
X-Ray diagnostic installation
In FIG. 1 an x-ray tube 1 is illustrated which is operated by a high voltage generator 2 and emits a radiation beam which penetrates a patient 3 and projects a ...
|
|
|
Inks and liquid developers containing colored silica particles
What is claimed is: 1. A liquid developer composition which comprises a liquid medium, a polymeric material soluble in the liquid medium, a charge control agent, and a ...
|
|
|
Electric component compression bonding machine and method
OF THE INVENTION In the followings, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 6 is a perspective view ...
|
|
|
Ink-jet recording ink, ink-jet recording ink set, ink cartridge, ink-jet printer, and ink-jet printing method
It is an object of the present invention to provide, after solving the above conventional shortcomings, an ink and an ink set which use a pigment as a coloring material ...
|
|
|
Color display device having liquid crystal cell and fluorescent display with two different luminous sections
The present invention has been made in view of the foregoing disadvantage of the prior art. Accordingly, it is an object of the present invention to provide a field-...
|
|
|
Multipanel liquid crystal display device
It is an object of the present invention to provide a multipanel liquid crystal display device in which such a blank portion formed at the joint between adjoining liquid ...
|
|
|
Image transfer laser engraving
Having thus described the invention, what is claimed is: 1. Laser engraving apparatus comprising: source means for a laser beam; first and second support tables having ...
|
|
|
Deformable mirror
The invention relates to a deformable mirror making it possible to obviate the aforementioned disadvantages. For this purpose, the mirror according to the invention and ...
|
|
|
Erasable label kit
OF THE PREFERRED EMBODIMENTS Turning now descriptively to the drawings, in which similar reference characters denote similar elements throughout the several views, FIG. ...
|
|
|
Projection-type display apparatus
Accordingly, in order to overcome the above-described problems of conventional devices, it is an object of the present invention to provide a projection-type display ...
|
|
|
LCD 
