Holographic test method for rotational effects on gears

Details Holographic test method for rotational effects on gears Holographic test method for rotational effects on gears

1985-04-11

1986-11-25

LaRoche, Eugene R.

Optics: measuring and testing

By particle light scattering

With photocell detection

350 377, G03H 130, G01B 921

Patent

active

046245685

ABSTRACT:
A holographic method for determining rotational effects upon either gear of gears (1, 2) of a gear set having respective mutually orthogonal rotational axis (C.sub.1, C.sub.2). Particularly, a holographic recording medium or element 12 is secured to gear (1) so that is rotates in synchronization therewith about axis (C.sub.1). Gear (2) is illuminated by a pulsed collimated light beam (L) emitted from a source (14) such as a laser. Beam (L) is reflected from gear (2) as object beam (0) substantially parallel to axis C.sub.2 and means such as a semi-reflective mirror 16 having a slit (18) is provided for directing a reference beam (R) and object beam (0) towards element (12). Development of element (12) after exposing it to beams (R and 0) at two different rotational conditions provides interference lines (f.sub.1, f.sub.2) enabling a viewer of the holographic image of gear 2 to determine the effect of rotation thereupon.

REFERENCES:
patent: 3612693 (1971-10-01), Stetson
patent: 3709605 (1973-01-01), Tsuruta

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