Download Animals Grade 6 (Holt Science & Technology Modules 2005) by Holt Rinehart & Winston PDF

By Holt Rinehart & Winston

ISBN-10: 0030255341

ISBN-13: 9780030255342

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Thus rays that originate at the front focal point of the objective lens, are collimated after passing through the objective lens, and are then focused onto the image sensor by the imaging lens. In general, microscope objective lenses have very small aberrations, which are minimized to the diffraction limit. Microscope objective lenses are used in a wide range of high-precision optical systems. 8). 1), and is typically used in relation to microscope objective lenses. In microscopy, NA is important because it indicates the resolving power of a lens.

2) ????= where n = Refractive index of the medium surrounding the object P ???? = Half-angle of the maximum cone of light that can enter (or exit) the lens ???? = Wavelength of the light being imaged. 8 Camera Lens Usually, camera lenses are manufactured with aberration compensation suitable for an object located at an infinite distance or an object which forms an image with a lateral magnification between 1/40 and 1/50. For these reasons, great care needs to be taken when positioning a camera lens in practical applications.

This time we have introduced principal points in order to allow us to treat actual lenses, which have finite thicknesses. 24). 13 fʹ sʹ Illustration of rays, showing the lens, the object, and its image where AB A′ B′ F F′ H H′ f s s′ = = = = = = = = = Object Image First focal point Second focal point Primary principal point Secondary principal point Focal length of the lens Distance HB of object from lens, which has a − sign when s is to the left of the lens. Distance H′ B′ of image from lens, which has a + sign when s′ is to the right of the lens.

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