High-resolution optic displacement measurement using a dual photodiode sensor

John L. Remo

doi:10.1117/1.601454

1 August 1997 High-resolution optic displacement measurement using a dual photodiode sensor

John L. Remo

Optical Engineering, Vol. 36, Issue 8, (August 1997). https://doi.org/10.1117/1.601454

Comparative displacement measurements are made using laser diode (LD) and light emitting diode sources, fiber optic collimators, and a dual-photodiode detector (DPD). It is shown that a relative displacement resolution < 2 nm is possible with the LD source. This result is interpreted to indicate that the coherent LD sources illuminating the DPD temporally correlates the mutual irradiation function of the signals between each photodiode segment and significantly reduce electronic (shot) noise, reduces the variance, and thereby enhances resolution.

Citation Download Citation

John L. Remo "High-resolution optic displacement measurement using a dual photodiode sensor," Optical Engineering 36(8), (1 August 1997). https://doi.org/10.1117/1.601454

Published: 1 August 1997

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available