The Measurement of Long Focal Length Based on Talbot Effect of Ronchi Grating

[in Chinese]; [in Chinese]; [in Chinese]; [in Chinese]

Journals >Acta Optica Sinica >Volume 22 >Issue 11 >Page 1328 > Article

Acta Optica Sinica
Vol. 22, Issue 11, 1328 (2002)

The Measurement of Long Focal Length Based on Talbot Effect of Ronchi Grating

[in Chinese]^*, [in Chinese], [in Chinese], and [in Chinese]

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[in Chinese]

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[in Chinese], [in Chinese], [in Chinese], [in Chinese]. The Measurement of Long Focal Length Based on Talbot Effect of Ronchi Grating[J]. Acta Optica Sinica, 2002, 22(11): 1328 Copy Citation Text

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Abstract

A new method for long focal length measurement is presented, which is accomplished by obtaining the angle of moiré stripe formed by Talbot effect of Ronchi grating. The formula of calculating the long focal length from the angle of Moiré stripe is derived. Error analysis demonstrates that this method can be applied to the real time testing with high accuracy.

Keywords

focal length measurement Moiré stripe Talbot effect Ronchi grating

[in Chinese], [in Chinese], [in Chinese], [in Chinese]. The Measurement of Long Focal Length Based on Talbot Effect of Ronchi Grating[J]. Acta Optica Sinica, 2002, 22(11): 1328

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