Abstract

A spectral confocal displacement and morphology measurement device with a photopolymer-based coaxial holographic lens as a high dispersion element is developed. The linear dependence of the axial spatial position on the peak wavelength of dispersion spectrum provides a high accuracy and large range for measuring displacement and morphology. In the linear dispersion region, accompanied with a 120 nm shift of peak wavelength, the measure position range exceeds 20 mm. The available experimental accuracy of displacement and morphology can reach 47.5 μm/0.5 nm using a commercial optical fiber spectrum with a resolution of 0.5 nm. Utilizing thin polymer-based holographic lens with high dispersion can effectively compact the device size. Simultaneously, it can provide a large axial dispersion for measuring the spatial position characterization compared with the traditional glass-based dispersion lens group. A holographic optical lens based on a photopolymer is expected to apply in high-precision surface morphology measurement of large-scale macroscopic objects. It will improve the measurement accuracy and accelerate the development of holographic optical elements.

© 2019 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Improved chromatic confocal displacement-sensor based on a spatial-bandpass-filter and an X-shaped fiber-coupler

Jiao Bai, Xinghui Li, Qian Zhou, Kai Ni, and Xiaohao Wang
Opt. Express 27(8) 10961-10973 (2019)

Study of the shrinkage caused by holographic grating formation in acrylamide based photopolymer film

Mohesh Moothanchery, Izabela Naydenova, and Vincent Toal
Opt. Express 19(14) 13395-13404 (2011)

Laser differential confocal lens refractive index measurement

Weiqian Zhao, Yun Wang, Lirong Qiu, and Haorong Guo
Appl. Opt. 50(24) 4769-4778 (2011)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription