Test Object


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Test Object

 

a resolution chart or model used in factory and operating testing of motion-picture equipment and camera lenses. Depending on their purpose, test objects may contain various elements, such as a scale for checking the alignment of the boundaries of the frame on the film and in the camera viewfinder, a gray scale for monitoring the constancy of the exposure, and crosshatched and radial test patterns for determining image sharpness and stability. The test objects are placed at a specific distance in front of the lens of the equipment being tested, on a stand with light providing uniform illumination. In certain cases the filming is done in natural light. Low-voltage incandescent lamps are used as test objects for checking the synchronization of the shutter and the intermittent movement. The results of the test filming are judged from the image of the objects produced on the film, using where necessary a magnifying glass, a projector, a densitometer, or a measuring microscope.

A. A. SAKHAROV

References in periodicals archive ?
According to ARP4754A, testing demonstrates that a test object fulfills its intended function and provides confidence that it does not perform unintended functions that impact safety.
A2, a medium-sized test object, the knife exemplar fabricated from either aluminum (UNS A95052) or steel (UNS G41300), is shown.
For the purpose of comparison of data acquisition methods, dedicated test object was prepared.
Given these results, it is worth reexamining numerical discrimination learning and its transfer using familiar test objects.
Now, this new HELIOT 904D4 model with 500/600 (50 Hz/60 Hz) L/min roughing pump has been added to fulfill the requirement to test even very-large volume test objects.
Hence based on the notes as seen in Figure 6 a wooden human body model (the first note) (a 3-D test object) which can be covered by layer of aluminum [1] (the second note) has been designed and fabricated.
At the present stage of technological development, the sensitive determination of toxic substances presence in the water is possible according to the behavioral characteristics of test objects by the means of their digital image computer analysis.
The solution requires hypothetical subjective assumptions AS and verification of their consistency with the objective experimental data AO on the test object. According to Leibniz, [A.sub.O] is "truths of fact" ("verite de fait") and [A.sub.S] is "truths of reason" ("verities de raison").
In the case of the immersion testing using phased array it is an inverse problem--how to calculate required water gap range, when the focal point depth in the test object is known.
Reference object Test object Egg Light bulb Egg Lighter Orange Apple Orange Lemon Stack of cards Stack of cards x 2 Cereal box Cereal box small Cereal box small Cereal box small x 2 CD CD x 5 CD CD x 4 Thin book Thin book x 3 Thin book Thin book x 2 Small hammer Small brick
The test object was a waffle iron sprayed with Krylon Bright Silver #1401 paint, which was irradiated with a flux of 500 [micro]W/[cm.sup.2] using a Nd:YAG laser at 532 nm.