KR890003152B1 - Multi directional injection equipment of laser beam - Google Patents

Abstract

The scanner having hologram reflectors arranged with different radius provides multiscanning patterns oriented from one laser source. Hologram plates with different focal distances (A1-8) are deposited around the circumference of radius R1 and reflectors (M1-8) are deposited between the plates. Other hologram plates (B1-8) are deposited around the circumference of radius R2 (R2<R1) for scanning the different patterns.

Description

Multi-directional scanning device of the laser beam

1 is a block diagram of a scanning device and a scanning pattern of the present invention.

* Explanation of symbols for main parts of the drawings

A ₁ -A ₈ : hologram plate B ₁ -B ₈ : hologram plate

M ₀ -M ₈ : Reflector 1: Disk

2: light source 3: focusing lens

S: Screen

According to the present invention, a plurality of hologram plates arranged on circumferences of different laser radii output from one laser light source are scanned using a reflector, thereby allowing a plurality of optical scans to be carried out with one laser light source. The present invention relates to a configuration of a multi-directional scanning device for laser shaving to obtain a pattern.

When reading bar code information displayed on a conventional product, information written in a bicode is read by changing the reflected light intensity by scanning a beam beam of a laser light or the like to detect the reflector.

In this case, there is a need for a scanning device that scans a beam of light in multiple directions within a specific plane and draws several princess patterns that intersect each other. Conventionally, a predetermined distance is spaced on two rotating cylinders of different radius on one rotating disk. While maintaining the position of a plurality of holographic plates having different focal positions of the laser light beam drawn on the screen, two different laser light sources on the hologram plate arranged on the first circumference and the hologram plate arranged on the second circumference Scans the light beam output from the light source, but alternately scans the hologram plate arranged on the first circumference and the hologram plate arranged on the second circumference so as to alternately scan each other to obtain a plurality of patterns of optical radiation on the screen. have.

However, such a conventional multi-directional scanning device requires as many light sources as the number of light scanning lines, so if n light scanning patterns are required, n light sources should be installed, thus making the configuration of the scanning device complicated and larger, thereby increasing manufacturing costs. Since it is necessary to install a light source, the configuration of the scanning device becomes complicated and large, thereby increasing the manufacturing cost and inconveniently increasing the power consumption for driving a plurality of light sources.

In order to solve the problems of the conventional optical scanning device, it is possible to draw a plurality of optical scanning lines in different directions on a screen by using a reflector from one light source, thereby making it possible to reduce the size and weight of the device and to reduce manufacturing costs. Another object of the present invention is to provide a multi-directional scanning device for a laser light beam to reduce the power consumption for driving a light source, while referring to the accompanying drawings. Referring to the configuration and effect of the present invention in detail.

First, referring to FIG. 1, the configuration of the present device will be described on the rotating disk ₁ with a hologram plate A ₁ -A ₈ having different focal positions on the same plane on the first circumference having a radius R ₁ . At the same time, the reflecting mirrors M ₁ -M ₂ are installed between the hologram plates A ₁ -A ₈ , respectively, and are arranged on the rotating disc 1 with a second circumference having a radius R ₁ > R ₂ . On the same plane, the holographic plates B _{1 to} B ₈ having different focal lengths are installed at predetermined intervals, and are output from the light source 2 installed below the rotating disk 1 and connected to the connection lens 3 by a laser beam beam ( 4) reflects the light beams scanned by the hologram plates A ₁ -A ₈ or the reflectors M ₁ -M ₈ on the first circumference R ₁ by the reflectors M ₀ provided on the lower side of the disk to reflect the second beams. Scanning the hologram plates (B ₁ -B ₈ ) on the circumference (R ₂ ) to draw different scanning lines (L, L ') pattern on the screen (S).

Effects of the present invention configured as described above are as follows. In FIG. 1, the rotating disk 1 is made of light metal such as aluminum, and the motor and its peripheral devices for driving the rotating disk 1 are ordinary technical means, and thus, detailed description of the structure and explanation of operation are omitted. Silver laser light shall be used.

In FIG. 1, when the rotating disk 1 is rotated, if the first laser beam 4 scans the hologram plate A ₁ arranged on the first circumference, the laser beam deflected on the hologram plate A ₁ will be screened. When the optical disks such as the dotted line L are drawn on the S and the rotating disk 1 is further rotated to scan the laser beam 4 to the reflector M ₁ , the laser reflected by the reflector M ₁ is reflected. the beam 4, the solid line on the reflection mirror (M _0), the second circumference (R ₂₎ holographic plate is the injection of (B ₁₎ holreu grams plate (B ₁₎ (S) deflected laser beam to a screen from the on by the ( L ') draws an optical line in the same direction.

Therefore, by the continuous rotation of the rotating disk (1), in the same manner as above, the optical line and the second cylindrical hologram B ₁ -in the same direction as the dotted line by the hologram plates A ₁ -A ₈ on the _first cylinder. B ₈ ) is drawn on the screen S in the same direction as the solid line by the solid line, and as a result, a two-way optical scanning pattern can be obtained.

Therefore, in the same manner as above, the hologram plates having different focal lengths on the same plane are arranged at a predetermined interval on the third circumference satisfying the radius R ₂ and R ₂ > R ₃ of the second circumference, and the hologram plate B on the second circumference (B). ₁ -B ₈ ) If a new reflector is installed between the hologram plates (A ₁ -A ₈ ) on the first cylinder and below the rotating disc (1) at an angle to scan the hologram plates on the third cylinder after scanning, By the same action, it is possible to obtain a three-way photorefraction pattern.

Therefore, by expanding this, it is possible to obtain a multi-directional optical fiber pattern from one light source (2) by the addition of a reflector. As described above, according to the present invention, since the laser beam can be scanned in one direction using one laser light source, the device can be made compact and light in weight, and its structure is simple. There is an advantage.

Claims (1)

Hologram plates with different focal positions on the same plane with the first circumference of radius R ₁ on the rotating disk 1 in arranging the hologram plate circumferentially on the rotating disk and scanning a laser beam to form an optical scanning pattern. While installing (A ₁ -A ₈ ) at predetermined intervals, reflectors (M ₁ -M ₂ ) are installed between the hologram plates (A ₁ -A ₈ ), respectively, and the radius R ₁ on the rotating disc (1). > Hollow plates (B ₁ -B ₈ ) with different focal lengths on the same plane on the second circumference of R ₂ are installed at predetermined intervals, and are output from the light source (2) installed under the rotating disk (1) and the connection lens The optical bins 4 connected to (3) are to be scanned by the hologram plates A ₁ -A ₈ or the reflectors M ₁ -M ₈ on the first circumference, but are reflected by being scanned by the reflectors M ₁ -M ₈ . the light beam is reflected by the rotating disc (1), the reflecting mirror is installed at the lower side (M _0), so that the scanning holographic plates (B ₁ -B ₈₎ on the second circumference W screen (S) with different scanning line direction on the (L, L ') of the laser beam the multi-directional scanning device, characterized in that to draw a pattern.

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