Patent ID: 7057659
Filing Date: 2006-06-06
Classification: G01J,G02B,H04N

Abstract:
1. An image pickup system comprising: an image pickup optical system; an electronic image pickup device having three or more different spectral characteristics to obtain a color image; and a controller for implementing signal processing or image processing on the basis of an output from the electronic image pickup device, wherein an optical element that takes part in the determination of a focal length in said image pickup system is made up of an optical element making use of a refraction phenomenon alone, and wherein a 400 nm wavelength input/output ratio, which is an output signal strength ratio with respect to an input quantity of light at 400 nm wavelength, is 10% or less with respect to the highest value of input/output ratios from 400 nm to 700 nm wavelength, each of the input/output ratios from 400 nm to 700 nm being an output signal strength ratio with respect to an input quantity of light at an arbitrary wavelength from 400 nm to 700 nm wavelength, wherein said input quantity of light is defined by the quantity of a light beam emanating from the same object point and entering said image pickup optical system, and wherein said output signal strength is defined by the strength of a signal produced from said controller in response to said light beam, wherein when the image pickup optical system is focused at 70% of an effective screen thereof on an infinite object point, chromatic aberrations in meridian section at 400 nm wavelength are equivalent in size to four or more pixels.