US4577940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moire microscope
Assignee: Honeywell International Inc
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Filing: 1984-12-19
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Granted: 1986-03-25
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Expires: 2004-12-19
Abstract
Abstract A moire microscope comprises an objective lens, a collimating lens, and a pair of spaced-apart gratings arrayed along an optic axis and adapted for providing a magnified moire deflectogram of a phase object. The microscope provides a simple apparatus for preparing a map of optical thickness gradients, from which quantitative data concerning the object can be computed.
Inventors
- 👤 Jerzy S. Krasinski
- 👤 Donald F. Heller
- 👤 Oded Kafri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:16
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/60
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
58 words
An apparatus for moire microscopy comprising, in combination and spaced apart successively along an optic axis, (a) an objective lens for focusing a light beam from an object, (b) a collimating lens, for collimating the beam from the objective lens, and (c) two spaced-apart gratings for producing from the collimated beam a magnified moire deflectogram of the object.
Claim 2
Independent Claim
58 words
An apparatus for moire microscopy comprising, in combination and spaced apart successively along an optic axis, (a) an objective lens for focusing a light beam from an object, (b) a collimating lens, for collimating the beam from the objective lens, and (c) two spaced-apart gratings for producing from the collimated beam a magnified moire deflectogram of the object.
Claim 3
Dependent Claim
21 words
The apparatus of claim 1 in which rulings on one of the gratings are parallel to rulings on the other grating.
Claim 4
Dependent Claim
28 words
The apparatus of claim 1 in which one of the gratings is mounted so that it is rotatable about an axis that substantially coincides with the optic axis.
Claim 5
Dependent Claim
16 words
The apparatus of claim 1 further comprising means for making visible the deflectogram of the object.
Claim 6
Dependent Claim
18 words
The apparatus of claim 4 in which the means for making the deflectogram visible is a matte screen.
Claim 7
Dependent Claim
18 words
The apparatus of claim 4 in which the means for making the deflectogram visible includes a photosensitive material.
Claim 8
Dependent Claim
17 words
The apparatus of claim 1 further comprising a beam splitter between the collimating lens and the gratings.
References Cited (Backward Citations)
US4459027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |