The Minifire from Precision-Optical Engineering is a 1-in.-aperture Fizeau optical test interferometer. Designed for testing on optical production lines, the device has an alignment screen for setting up the optics and may be mounted vertically or horizontally as needed. The test fringes may be viewed on a 9-in. high-resolution fringe monitor. The company says it provides better than λ/20 accuracy. The Minifire's capabilities can be extended with phase-shifting and static fringe analysis options.