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"TIRDF." Fullformexpand.com, https://www.fullformexpand.com/tirdf/total-internal-reflection-dark-field. Accessed 20 Feb. 2026.
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"TIRDF." (n.d.). Fullformexpand.com. Retrieved February 20, 2026, from https://www.fullformexpand.com/tirdf/total-internal-reflection-dark-field.
TIRDF. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/tirdf/total-internal-reflection-dark-field (Accessed: 20 February 2026).