TWAV: Test Wavelength

This operand sets the test wavelength. When setting the default tolerances, OpticStudio adds a TWAV operand with a value of 0.6328 micrometers (HeNe) for the test wavelength. If no TWAV operand is defined, then OpticStudio defaults to the primary wavelength. More than one TWAV may be placed in the operand list; each operand defines the test wavelength for the operands that follow. Only operands whose min and max values are measured in fringes are affected by this setting. The "Min" column in the Tolerance Data Editor is used to edit and display the test wavelength.

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• Operand Properties (tolerance data editor)