Optimum contrast in single mirror off-axis Schlieren system
Abstract
Schlieren technique reveals the refractive index variations caused by temperature or pressure gradients to visualise fluid non-uniformities and dynamics, quantitatively measure gas density, and observe transparent solid deformities. The simplest and relatively least expensive Schlieren setup is the single-mirror off-axis Schlieren apparatus with knife-edge. We investigate the physical conditions of Schlieren parameters that will result to maximum gray-level contrast. In the setup, the distance measured from the concave mirror's vertex to its focal point is F = 64 inches. To achieve high contrast images, experiment revealed that the object distance must be ≈F and the knife edge is positioned at ≈2F while camera is focused within the range 0 to F.
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Building bridges and exploring frontiers
6-9 June 2018, Puerto Princesa City
Please visit the activity webpage for SPP2018 for more information on this year's conference.