12. A microscope has a 16mm objective lens with an aperture diameter D. = 4 mm, and a 25 mm ocular lens with an aperture

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12 A Microscope Has A 16mm Objective Lens With An Aperture Diameter D 4 Mm And A 25 Mm Ocular Lens With An Aperture 1 (49.39 KiB) Viewed 43 times

12. A microscope has a 16mm objective lens with an aperture diameter D. = 4 mm, and a 25 mm ocular lens with an aperture diameter D, = 8mm. Find a) the working distance, b) the position and size of the aperture stop, entrance and exit pupil, c) the position and size of the field stop, entrance and exit ports, d) the linear FOV on the slide at 50% vignetting and e) compare the angular FOV at 50% vignetting at the eye to the angle subtended by the linear FOV (found in part d) at 250 mm, f) Draw a diagram showing slide, pupils, ports and FOV's. Answers: a) 17.6 mm; b) the objective is the aperture stop and entrance pupil, of 4 mm diameter, the exit pupil is at an eye relief of 28.55 mm and has a diam of -0.5682 mm; c) the ocular is the field stop and exit port of 8 mm diameter, the entrance port is 17.38 mm in front of the objective lens; d) diameter of linear FOV on slide = 0.7005 mm; e) 8° vs. 0.08° or (-)100x.