Abstract: A method and system for producing two differently focused /defocused images is disclosed in which one or more beam splitting means (16, 18) are used to split a beam (14) into a plurality of resultant beams (20, 26, 24) and a plurality of separate sensors (30, 34, 32) are used to detect the beams (20, 26, 24). The path length of the resultant beams (20, 26, 24) to the respective sensors (30, 34, 32) are different for each resultant beam, which can be achieved by placing the sensors (30, 34, 32) at different distances from the respective exit points of the resultant beams (20, 26, 24) from the beam splitting means (16, 18) or by providing optical elements (such as, for instance, movable transparent wedge-shaped members) between the beam splitting means (16, 18) and the sensors 830, 34, 329. A method and system for determining movement of an object by capturing sequential images of the object are also disclosed.

Abstract: Optical loupes are disclosed which include eyepieces (21) having an ocular (40) and an objective (42). A transfer tube (44) is mounted for transferring light between the ocular (40) and objective (42). The objective (42) is arranged at an obtuse angle with respect to the ocular and the ocular and objective are in side by side relationship. The transfer tube includes a transfer means having mirrors for transferring light from the objective to the ocular. A light source (38) including a plurality of diodes (100) is mounted between the eyepieces (21) of illuminating a work area. The eyepieces (21) can be adjusted in the interpupliery direction by adjustment nobs (35) which engage in slots (34) on a support bar (22) which hold the eyepieces (21).