Method of manufacturing display having diffraction grating patterns

• US 5,132,812 A
• Filed: 10/15/1990
• Issued: 07/21/1992
• Est. Priority Date: 10/16/1989
• Status: Expired due to Term

• Current Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Original Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Inventors: Takahashi, Susumu, Toda, Toshiki, Iwata, Fujio
• Primary Examiner(s): BEN, LOHA
• Assistant Examiner(s): Ryan, J. P.
• Application Number:
  US07/597,229
• Time in Patent Office: 645 Days
• Field of Search: 350/3.66, 350/162.11, 350/162.17, 350/162.18, 350/162.2, 350/320, 250/492.3
• US Class Current: 359/9
• CPC Class Codes: G02B 5/18 Diffraction gratings holographic optical elements G02B5/32, G03H; integrally combined with optical fibres G02B6/02057; for coupling light guides G02B6/34; integrally combined with optical integrated light guides G02B6/12; grating systems G02B27/44
• CPC Class Codes: G02B 5/32 Holograms used as optical elements
• CPC Class Codes: G03H 1/30 discrete holograms only
• CPC Class Codes: G03H 2001/0482 Interference based printer
• CPC Class Codes: G03H 2001/0497 Dot matrix holograms
• CPC Class Codes: Y10S 359/90 Methods

Abstract

A method of manufacturing a display having diffraction grating patterns, includes the steps of (a) obtaining a plurality of two-dimensional images by observing an object at a plurality of positions, and inputting images of the plurality of two-dimensional images in a computer, (b) selecting nth image data from the plurality of image data, (c) inputting data of a reproducing light source position and a view direction, (d) inputting predetermined dot data of the nth image data, (e) determining a pitch and a direction of a grating and an area of a dot on the basis of the data of the reproducing light source position and the view direction and the dot data, (f) moving an X-Y stage to a predetermined position on the basis of the dot data and delineating the diffraction grating by using an electron scanning unit, (g) sequentially incrementing an address of the dot data and repeating the steps (d) to (f) until all data corresponding to the nth image data are processed, and (h) selecting another image data, and repeating the steps (b) to (g) until all image data are processed.

Claims

1. A method of manufacturing a display having diffraction grating patterns, comprising the steps of:

(a) obtaining a plurality of two-dimensional images by observing an object at a plurality of positions, and inputting images of the plurality of two-dimensional images to a computer;

(b) selecting nth image data from the plurality of image data;

(c) inputting data of a reproducing light source position and a view direction;

(d) inputting predetermined dot data of the nth image data;

(e) determining a pitch d and a direction Ω

of a diffraction grating and an area of a dot on the basis of the data of the reproducing light source position and the view direction and the dot data, wherein the pitch d and a direction Ω

are obtained according to the following equations;

space="preserve" listing-type="equation">tan(Ω

)=sin(α

)/sin(θ

)

space="preserve" listing-type="equation">d=λ

/√

sin.sup.2 (θ

)-sin.sup.2 (α

)

where θ

is the incidence angle of illumination light, α

is the direction of 1st-order diffracted light, and λ

is the wavelength of the 1-st order diffracted light;

(f) moving an X-Y stage to a predetermined position on the basis of the dot data and delineating the grating by using an electron scanning unit;

(g) sequentially incrementing an address of the dot data and repeating the steps (d) to (f) until all data corresponding to the nth image data are processed; and

(h) selecting another image data, and repeating the steps (b) to (g) until all image data are processed.

2. A method of manufacturing a display having diffraction grating patterns by using a two-beam interference method, comprising the steps of:

(a) obtaining a plurality of two-dimensional images by observing an object at a plurality of positions, and inputting images of the plurality of two-dimensional images to a computer;

(b) selecting nth image data from the plurality of image data;

(c) inputting data of a reproducing light source position and a view direction;

(d) inputting predetermined dot data of the nth image data;

(e) determining a pitch and a direction Ω

of a diffraction grating an an exposure time on the basis of the data of the reproducing light source position and the view direction and the dot data, wherein the direction Ω

of the diffraction grating is obtained according to the following equation;

space="preserve" listing-type="equation">tan(Ω

)=sin(α

)/sin(θ

)

wherein θ

is the incidence angle of illumination light, α

is the direction of 1st-order diffracted light, and λ

is the wavelength of the 1-st order diffracted light;

(f) moving an X-Y-θ

stage to a predetermined position on the basis of the dot data and forming the grating by using the two-beam interference method;

(g) sequentially incrementing an address of the dot data and repeating the steps (d) and (f) until all data corresponding to the nth image data are processed; and

(h) selecting another image data, and repeating the steps (b) to (g) until all image data are processed.