Abstract

Bar arrangements used by conventional diffractive barcodes are usually similar to those used by diffusive barcodes. We, however, propose a modified diffractive barcode with bar arrangements different from those used by diffusive barcodes. A modified diffractive barcode pattern is composed of many parallel grating-dot lines. When the grating-dot lines are scanned by a laser beam in sequence, different bright bar arrangements corresponding to different codes appear in sequence.

© 2008 Optical Society of America

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References

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  1. D. J. Reiley, Opt. Eng. (Bellingham) 37, 688 (1998).
    [CrossRef]
  2. S. J. Bever and J. P. Allebach, Proc. SPIE 1211, 38 (1990).
    [CrossRef]
  3. S. L. Yeh, Opt. Eng. (Bellingham) 44, 125804 (2005).
    [CrossRef]
  4. Z. Zhong, J. Ding, Z. Jin, P. Liang, and G. Wengi, Appl. Opt. 41, 380 (2002).
    [CrossRef]
  5. S. L. Yeh, Opt. Eng. (Bellingham) 46, 113602 (2007).
    [CrossRef]
  6. http://www.ahead.com.tw.

2007 (1)

S. L. Yeh, Opt. Eng. (Bellingham) 46, 113602 (2007).
[CrossRef]

2005 (1)

S. L. Yeh, Opt. Eng. (Bellingham) 44, 125804 (2005).
[CrossRef]

2002 (1)

Z. Zhong, J. Ding, Z. Jin, P. Liang, and G. Wengi, Appl. Opt. 41, 380 (2002).
[CrossRef]

1998 (1)

D. J. Reiley, Opt. Eng. (Bellingham) 37, 688 (1998).
[CrossRef]

1990 (1)

S. J. Bever and J. P. Allebach, Proc. SPIE 1211, 38 (1990).
[CrossRef]

Allebach, J. P.

S. J. Bever and J. P. Allebach, Proc. SPIE 1211, 38 (1990).
[CrossRef]

Bever, S. J.

S. J. Bever and J. P. Allebach, Proc. SPIE 1211, 38 (1990).
[CrossRef]

Ding, J.

Z. Zhong, J. Ding, Z. Jin, P. Liang, and G. Wengi, Appl. Opt. 41, 380 (2002).
[CrossRef]

Jin, Z.

Z. Zhong, J. Ding, Z. Jin, P. Liang, and G. Wengi, Appl. Opt. 41, 380 (2002).
[CrossRef]

Liang, P.

Z. Zhong, J. Ding, Z. Jin, P. Liang, and G. Wengi, Appl. Opt. 41, 380 (2002).
[CrossRef]

Reiley, D. J.

D. J. Reiley, Opt. Eng. (Bellingham) 37, 688 (1998).
[CrossRef]

Wengi, G.

Z. Zhong, J. Ding, Z. Jin, P. Liang, and G. Wengi, Appl. Opt. 41, 380 (2002).
[CrossRef]

Yeh, S. L.

S. L. Yeh, Opt. Eng. (Bellingham) 46, 113602 (2007).
[CrossRef]

S. L. Yeh, Opt. Eng. (Bellingham) 44, 125804 (2005).
[CrossRef]

Zhong, Z.

Z. Zhong, J. Ding, Z. Jin, P. Liang, and G. Wengi, Appl. Opt. 41, 380 (2002).
[CrossRef]

Appl. Opt. (1)

Z. Zhong, J. Ding, Z. Jin, P. Liang, and G. Wengi, Appl. Opt. 41, 380 (2002).
[CrossRef]

Opt. Eng. (Bellingham) (3)

S. L. Yeh, Opt. Eng. (Bellingham) 46, 113602 (2007).
[CrossRef]

D. J. Reiley, Opt. Eng. (Bellingham) 37, 688 (1998).
[CrossRef]

S. L. Yeh, Opt. Eng. (Bellingham) 44, 125804 (2005).
[CrossRef]

Proc. SPIE (1)

S. J. Bever and J. P. Allebach, Proc. SPIE 1211, 38 (1990).
[CrossRef]

Other (1)

http://www.ahead.com.tw.

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Figures (5)

Fig. 1
Fig. 1

Grating dot composed of some periodic straight fringes with a pitch p and with an orientation θ.

Fig. 2
Fig. 2

Diffractive and diffusive barcode patterns created by a two-beam writer.

Fig. 3
Fig. 3

Grating dots for different codes.

Fig. 4
Fig. 4

Setup used to reconstruct bright bars.

Fig. 5
Fig. 5

Bright bar images diffracted from the diffractive barcode pattern in Fig. 2.

Tables (1)

Tables Icon

Table 1 Bar Arrangements for Different Codes a

Equations (4)

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p = N λ [ a z 2 + b z 2 2 ( a x b x + a y b y ) ] 1 2 ,
θ = tan 1 ( a x b x b y a y ) ,
s x = 1.22 λ r d ( 1 b x 2 ) ,
s y = 1.22 λ r d ( 1 b y 2 ) ,

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