منابع مشابه
Biological Bifocal Lenses with Image Separation
Almost all animal eyes follow a few, relatively well-understood functional plans. Only rarely do researchers discover an eye that diverges fundamentally from known types. The principal eye E2 of sunburst diving beetle (Thermonectus marmoratus) larvae clearly falls into the rarer category. On the basis of two different tests, we here report that it has truly bifocal lenses, something that has be...
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Images taken with wide-angle cameras tend to have severe distortions which pull points towards the optical center. This paper proposes a new method for recovering the distortion parameters without using any calibration objects. The distortions cause straight lines in the scene to appear as curves in the image. Our algorithm seeks to find the distortion parameters that would map the image curves...
متن کاملTwo New Large Separation Gravitational Lenses from SDSS
We present discovery images, together with follow-up imaging and spectroscopy, of two large separation gravitational lenses found by our survey for wide arcs (the CASSOWARY). The survey exploits the multicolour photometry of the Sloan Digital Sky Survey to find multiple blue components around red galaxies. CASSOWARY 2 (or “the Cheshire Cat”) is composed of two massive early-type galaxies at z =...
متن کاملPhase separation of X-irradiated lenses of rabbit.
The phase separation temperature (Tcat) was studied as a function of time (age) after the administration of a single dose of radiation (2000 rad), which induces cataract in the rabbit lens. In the normal unirradiated lens, Tcat decreases linearly with age at a rate (DTcat/dt) approximately 2.2 degrees/week. In the irradiated lens, Tcat initially decreases with age much less than the normal lens...
متن کاملPhase separation in X-irradiated lenses of rabbit
The phase separation temperature (Tcat) was studied as a function of time (age) after the administration of a single dose of radiation (2000 rad), which induces cataract in the rabbit lens. In the normal unirradiated lens, Tcat decreases linearly with age at a rate (dTcat/dt) ~ 2.2°/iveek. In the irradiated lens, Tcat initially decreases with age much less than the normal lens, then rises sharp...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1996
ISSN: 0074-1809
DOI: 10.1017/s0074180900230933