Abstract: This invention comprises a pair of light deflecting members disposed in an optical path formed between a light source and an objective lens, and a pair of relay lenses disposed in an optical path formed between the pair of light deflecting members; and a slit member disposed in an optical path formed between the pair of relay lens.

Abstract: This invention relates to a confocal laser scanning transmission microscope including a deflecting element for deflecting a light beam at a set scanning frequency in a main scanning direction and an auxiliary scanning direction perpendicular to the main scanning direction to irradiate the light spot to a specimen, and the microscope further comprises an infinity compensating objective lens for collecting a transmitted light through the specimen to form into a parallel beam and a cube-corner-reflector disposed on the opposite side of the specimen across the objective lens and on the exit pupil position of the infinity compensating objective lens.

Abstract: An automotive engine crankshaft has a vibration balancing mass suspended from a main bearing cap on rods or bolts for an oscillatory radial movement in response to reciprocation of the mass by contoured cam wheels on the cheeks of the crankshaft, the cam wheels engaging rollers or cam follower wheels on a shaft freely rotatable in the balancing mass, the mass being restricted to a translational movement in a radial direction only, the mounting of the mass including a pivot/bushing that restricts the movement to the one translational direction only while at the same time permitting a slight rotational or pivotal movement of the mass about three axes to correct for any slight misalignment of the axis of the mass with respect to the axis of the crankshaft.

Abstract: A method and apparatus are described for viewing of phase phenomena by forming the image of an object by using the undiffracted beam and essentially only one of the sidebands and attenuating the undiffracted beam and the sideband at a rear focal plane of an image forming lens. My invention may readily be implemented in a conventional microscope by use of a suitable aperture in the front focal plane of a condenser lens and a suitable attenuator in the rear focal plane of the objective lens. In one embodiment, the condenser aperture is essentially semi-circular. The attenuator comprises a polarizer, a polarization filter and an analyzer with the filter being located substantially in the rear focal plane. The polarization sensitive filter is divided in equal halves one of which consists of polarization sensitive material having a direction of polarization that is perpendicular to that of the other half.