Optical: systems and elements – Light control by opaque element or medium movable in or... – Slit type
Patent
1995-02-24
1997-08-26
Dzierzynski, Paul M.
Optical: systems and elements
Light control by opaque element or medium movable in or...
Slit type
356329, 356331, 356332, G02F 128, G02B 500
Patent
active
056615892
ABSTRACT:
A system for translating applied linear motion into a slit width present between facing edges of two "Knife-blade" elements. In its preferred embodiment, two slide assemblies are firmly affixed to a frame such that loci of motion of slide elements thereof form an acute angle therebetween. Lower ends of each slide element, as viewed in vertically oriented frontal elevation, allow horizontal motion therebetween when said slide element lower ends are caused to simultaneously move vertically. An alternative embodiment provides that the slide elements be oriented such that said loci of motion of said slide elements are, for instance, horizontally directed. In its preferred embodiment the simultaneous motion of the slide elements is effected by a motor, preferably a precisely controlled computer driven stepper motor, which motor causes a threaded shaft therein to move vertically as a result of screw thread translation of motor imparted rotational motion to said threaded shaft.
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"Ratio--Recording System for Absorption Cell", JOSA, vol. 47, No. 5, p. 371 May 1957.
A.T. Collins, "A Spectrometer Slit-Servo, Using a D.C. Stepper Motor", J. Physics E, vol. 8, No. 12, p. 1021-1023, Bristol England, Dec. 1975.
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Dzierzynski Paul M.
J. A. Woollam Co. Inc.
Jr. John Juba
Welch James D.
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