Abstract

A schlieren apparatus capable of recording index of refraction gradients in self-luminous discharges such as arcs, sparks, and inductively coupled plasmas is described. Resolution of better than 50 μm is obtained over a clear, bright, uniform field. The geometric design of the system cancels coma, and small off-axis angles are used to keep astigmatism low.

High spatial resolution schlieren photography

J. W. Hosch and J. P. Walters
Appl. Opt. 16(2) 473-482 (1977)

Compact, self-aligned focusing schlieren system

Brett F. Bathel and Joshua M. Weisberger
Opt. Lett. 46(14) 3328-3331 (2021)

Methodology of designing compact schlieren systems using off-axis parabolic mirrors

Lingzhi Zheng, Adam J. Susa, and Ronald K. Hanson
Appl. Opt. 61(16) 4857-4864 (2022)

Compact color schlieren optical system

Donald R. Buchele and DeVon W. Griffin
Appl. Opt. 32(22) 4218-4222 (1993)

Knife-Edge Controller for a Schlieren System

C. B. Wells
Appl. Opt. 4(7) 815-818 (1965)