ARNOLD GREENE
Engineering in Newton, MA
License number
Massachusetts 11107
Issued Date
Oct 22, 1959
Expiration Date
Jun 30, 1996
Type
Metallurgical Engineer
Address
Address
Newton, MA 02459
Personal information
See more information about ARNOLD GREENE at radaris.comName
Address
Phone
87 Clifton Rd, Newton Center, MA 02459
2 Neponset View Ter, Walpole, MA 02081
Professional information
Microfilm Reader With Microfilm And Reticle Images Provided To Each Of Two Binocular Eyepieces
US Patent:
5024512, Jun 18, 1991
Filed:
Feb 7, 1989
Appl. No.:
7/309007
Inventors:
Arnold H. Greene - Newton MA
Harold E. Holden - St. Johnsbury VT
Harold E. Holden - St. Johnsbury VT
Assignee:
American Photo Systems, Inc. - St. Johnsbury VT
International Classification:
G02B 2120, G02B 2702, G02B 2734
US Classification:
350514
Abstract:
A process for high resolution high accuracy photoreduction of radiographs, a rotatable photographic copy stand for the photoreduction process, and a high resolution high accuracy microfilm reader with built-in measuring capabilities are shown. The photoreduction process employs a camera with high precision optics, a high resolution copy film, and a first developing solution containing 0. 014 to 0. 025 moles per liter of a 3-pyrazolidone as the primary developing agent plus a lesser amount of a secondary developing agent, in a reversal process, to yield positive images having gamma values of 1. 00 to 1. 05. The copy stand has multiple workstations mounted on a rotatable frame, and several lightboxes. The microfilm reader employs high precision optics throughout, and possesses a variable magnification objective lens, a beam splitter, ultrawide-angle eyepieces, and a movable measuring reticle, the image of which is superimposed upon the image from the objective lens for accurate measurement of features shown on a film being examined. By means of the disclosed process and apparatus, industrial radiographs or other sorts of X-rays are photoreduced and later reenlarged for reexamination and measurement of selected features, with an overall dimensional accuracy of at least 99. 9%.
High Precision Photoreduction Process And Related Apparatus
US Patent:
4849794, Jul 18, 1989
Filed:
Jul 20, 1987
Appl. No.:
7/075594
Inventors:
Arnold H. Greene - Newton MA
Harold E. Holden - St. Johnsbury VT
Harold E. Holden - St. Johnsbury VT
Assignee:
Micro-Radiographs, Inc. - Natick MA
International Classification:
G03B 2762
US Classification:
355 75
Abstract:
A process for high resolution high accuracy photoreduction of radiographs, a rotatable photographic copy stand for the photoreduction process, and a high resolution high accuracy microfilm reader with built-in measuring capabilities are shown. The photoreduction process employs a camera with high precision optics, a high resolution copy film, and a first developing solution containing 0. 014 to 0. 025 moles per liter of a 3-pyrazolidone as the primary developing agent plus a lesser amount of a secondary developing agent, in a reversal process, to yield positive image having gamma values of 1. 00 to 1. 05. The copy stand has multiple workstations mounted on a rotatable frame, and several lightboxes. The microfilm reader employs high precision optics throughout, and possesses a variable magnification objective lens, a beam splitter, ultrawide-angle eyepieces, and a movable measuring reticle, the image of which is superimposed upon the image from the objective lens for accurate measurement of features shown on a film being examined. By means of the disclosed process and apparatus, industrial radiographs or other sorts of X-rays are photoreduced and later reenlarged for reexamination and measurement of selected features, with an overall dimensional accuracy of at least 99. 9%.