Abstract

The images on a dot-matrix hologram contain many two-dimensional (2D) dots with different grating orientations and different grating pitches. Because the zeroth-order light nondiffracted by different grating structures has the same progress direction, the nondiffracted light can be diffracted to a 2D spot spectrum by the 2D dot structure. The 2D spot spectrum depends on grating depths and dot sizes. Although ordinary noises are troublesome for 2D spots, noises caused by special dot arrangement defects or special grating moiré fringes are useful in checking holograms. Since the features of grating depths, dot sizes, dot arrangement defects, and grating moiré fringes can be randomly changed on a case by case basis, 2D spot spectra in different cases are different. The aforementioned random features are used to identify dot-matrix holograms.

© 2006 Optical Society of America

Full Article  |  PDF Article
More Like This
Optical configuration and color-representation range of a variable-pitch dot matrix holographic printer

Chih-Kung Lee, Jeremy Wen-Jong Wu, Sheng-Lie Yeh, Chih-Wen Tu, Yi-An Han, Eric Hong-Zong Liao, Linus Ying-Yueh Chang, I-En Tsai, Hsiu-Hung Lin, Jeffrey Chi-Tang Hsieh, and Julie Tsai-Wei Lee
Appl. Opt. 39(1) 40-53 (2000)

Pattern composed of two-dimensional diffusion dots for showing dynamic images

Sheng Lih Yeh, Kuang Tsan Lin, and Yu Jui Cheng
Appl. Opt. 46(17) 3455-3461 (2007)

Artistic effect and application of moiré patterns in security holograms

Shou Liu, Xiangsu Zhang, and Hongkai Lai
Appl. Opt. 34(22) 4700-4702 (1995)

View More...

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 (7)

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

Tables (1)

You do not have subscription access to this journal. Article tables 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

Equations (4)

You do not have subscription access to this journal. Equations 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

Metrics

You do not have subscription access to this journal. Article level metrics 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