# Null test fourier domain alignment technique for phase-shifting point diffraction interferometer

## Abstract

Alignment technique for calibrating a phase-shifting point diffraction interferometer involves three independent steps where the first two steps independently align the image points and pinholes in rotation and separation to a fixed reference coordinate system, e.g, CCD. Once the two sub-elements have been properly aligned to the reference in two parameters (separation and orientation), the third step is to align the two sub-element coordinate systems to each other in the two remaining parameters (x,y) using standard methods of locating the pinholes relative to some easy to find reference point.

- Inventors:

- (5239 Miles Ave., Apt. A, Oakland, CA 94618)
- (1622 Oxford St., #5t, Berkeley, CA 94709)

- Issue Date:

- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA

- OSTI Identifier:
- 873207

- Patent Number(s):
- 6111646

- Assignee:
- Naulleau, Patrick (5239 Miles Ave., Apt. A, Oakland, CA 94618);Goldberg, Kenneth Alan (1622 Oxford St., #5t, Berkeley, CA 94709) LBNL

- DOE Contract Number:
- AC03-76SF00098

- Resource Type:
- Patent

- Country of Publication:
- United States

- Language:
- English

- Subject:
- fourier; domain; alignment; technique; phase-shifting; diffraction; interferometer; calibrating; involves; independent; steps; independently; align; image; pinholes; rotation; separation; fixed; reference; coordinate; ccd; sub-elements; properly; aligned; parameters; orientation; third; step; sub-element; systems; remaining; standard; methods; locating; relative; easy; third step; diffraction interferometer; properly aligned; fixed reference; alignment technique; /356/

### Citation Formats

```
Naulleau, Patrick, and Goldberg, Kenneth Alan.
```*Null test fourier domain alignment technique for phase-shifting point diffraction interferometer*. United States: N. p., 2000.
Web.

```
Naulleau, Patrick, & Goldberg, Kenneth Alan.
```*Null test fourier domain alignment technique for phase-shifting point diffraction interferometer*. United States.

```
Naulleau, Patrick, and Goldberg, Kenneth Alan. Sat .
"Null test fourier domain alignment technique for phase-shifting point diffraction interferometer". United States. https://www.osti.gov/servlets/purl/873207.
```

```
@article{osti_873207,
```

title = {Null test fourier domain alignment technique for phase-shifting point diffraction interferometer},

author = {Naulleau, Patrick and Goldberg, Kenneth Alan},

abstractNote = {Alignment technique for calibrating a phase-shifting point diffraction interferometer involves three independent steps where the first two steps independently align the image points and pinholes in rotation and separation to a fixed reference coordinate system, e.g, CCD. Once the two sub-elements have been properly aligned to the reference in two parameters (separation and orientation), the third step is to align the two sub-element coordinate systems to each other in the two remaining parameters (x,y) using standard methods of locating the pinholes relative to some easy to find reference point.},

doi = {},

journal = {},

number = ,

volume = ,

place = {United States},

year = {2000},

month = {1}

}

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