Abstract: The invention is directed to chemical-mechanical polishing pads comprising a transparent window comprising a polymer resin having a first index of refraction and an inorganic material having a second index of refraction. The transparent window has a light transmittance of about 10% or more at a wavelength of about 200 nm to about 10,000 nm. The difference between the first index of refraction and the second index of refraction is about 0.3 or less at the wavelength.

Abstract: The invention is directed to chemical-mechanical polishing pads comprising a transparent window comprising a polymer resin having a first index of refraction and an inorganic material having a second index of refraction. The transparent window has a light transmittance of about 10% or more at a wavelength of about 200 nm to about 10,000 nm. The difference between the first index of refraction and the second index of refraction is about 0.3 or less at the wavelength.

Abstract: An optical element for filtering infrared light for use in a radiometer is disclosed wherein at least one metal-organic infrared absorbing dye is at least partially dissolved homogeniously throughout a molded optical plastic.

Abstract: A plastic optical element having especially selected spectral transmission characteristics is structured to collect and direct radiation from a photographic scene onto the surface of a photodetector which operates to generate an output signal that can be used to predict an exposure value for the scene as based on the magnitude of the output signal. In combination with the photodetector, which is preferably a silicon photodiode, the optical element defines a photoelectric radiometer which has a preferred relative spectral sensitivity in the visible and near infrared region of the spectrum. The preferred spectral sensitivity of the radiometer is particularly suitable for evaluating the exposures required in high contrast scenes.

Abstract: A photoelectric radiometer structured to generate an output signal that can be used to predict an exposure value for a photographic scene as based on the magnitude of the radiometer output signal. The radiometer is provided with a preferred relative spectral sensitivity in the visible and near infrared regions of the spectrum to minimize exposure errors which otherwise can occur with certain types of high contrast scenes which contain objects that have widely different visible reflectivities. A positive lens collects radiation from a scene and directs it onto the surface of a silicon photodiode which in turn provides the output signal. The spectral sensitivity of the photodiode is suitably altered, e.g., with a filter, to provide the radiometer preferred relative spectral sensitivity.

Abstract: A developed and fixed unwashed negative component of a diffusion transfer photographic film unit is protected and preserved for an extended period.