JPH01266506A - Light beam splitting method and light beam splitting and modulating method - Google Patents

Abstract

PURPOSE:To make a beam splitting number twice as large as before by entering light beams of uniform intensity incident at a required angle into a light beam splitter which has a total reflecting film provided on one surface of a light transmitting material partially in a beltlike shape and a 50% reflecting film on the other parallel surface partially in a beltlike shape. CONSTITUTION:The light beam splitter 9 has the total reflecting film 9b formed by coating one surface of the light transmitting material 9a partially in the beltlike shape and also has the 50% reflecting film 9c formed by coating the other surface partially in the beltlike shape in parallel to the surface coated with the total reflecting film 9b. This 50% reflecting film 9c transmits the eight light beams which are incident under the total reflecting film 9b and travel in side by a half in quantity and reflects the remaining half of the light beams to the total reflecting film 9b. The light beams which travel in the light transmitting material 9a toward the total reflecting film 9b are reflected by the total reflecting film 9b and transmitted above the 90% reflecting film 9c on the opposite side. Thus, the light beams are split into upper and lower parts, which are projected.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention is capable of producing a halftone reproduction image on a recording material by controlling exposure means on the recording side using an image signal obtained by photoelectrically manipulating an original picture, for example. In particular, the present invention relates to a light beam splitting method and a light beam splitting modulation method necessary for recording a halftone image by independently modulating a plurality of beams based on image signals.

[Prior Art] Conventionally, a halftone image has been recorded by relatively scanning a recording material by independently modulating a large number of light beams arranged in a row based on an image signal. In many cases, the multiple light beams are split by arranging multiple total reflection mirrors and half reflection mirrors and reflecting one laser beam emitted from an argon laser onto these mirrors. Each light beam is independently modulated by a modulator.

For this reason, even when a multi-channel ultrasonic modulator is used as a modulator, the distance between the light beams is 1 to 2 inches apart, corresponding to the distance between the acoustic wave electrodes.

In this way, the pitch of the light beams is set to 1 to 2 square meters, but the beam diameter of the Gaussian beams of the adjacent light beams (effective for exposing the recording material) is It is required that the beam diameter of the intensity distribution be as close as possible to the contact state and as far away as possible. The reason for this is to prevent modulation of one light beam from affecting the light beams on both sides. In other words, this is to prevent the wolf talk phenomenon from occurring.

In this way, the spacing corresponds to the spacing of the acoustic wave electrodes of the modulator.
A large number of light beams lined up in a line, separated by 1 to 2 cm, are spaced close together using optical fibers, etc., so that the adjacent light beams are slightly shaped, and are condensed into a small size by a crystal optical system, so that they are placed on the recording material. irradiated. In this case, the intensity distribution of the light beam is a Gaussian distribution, so if the multiple light beams lined up in the above-mentioned column are arranged so that the adjacent light beams have the required shape, the beam diameter of the Gaussian beam becomes If they do not overlap in a state close to contact, the rows of dots created on the recording material by the multiple light beams lined up in a row will not be connected, and in this case, the multiple light beams are independently modulated based on the image signal. However, it becomes impossible to form mesh images of various sizes on the recording material.

Conventionally, a light beam splitter is used, in which one side of a glass plate is coated with a total reflection film and the other side is coated with a non-total reflection film, and a single light beam is internally reflected and a number of lights are lined up in a row. Japanese Patent Publication No. 122135 of 1972 and Japanese Patent Publication No. 1982 of 1972 as an invention for dividing light into light beams.
Year No. 10713 exists.

Both of them are made by coating a light transmitting material such as glass with a total reflection film on one side and a non-total reflection film on the other surface, so that a single light beam enters the light transmission material and is internally reflected. , a plurality of parallel light beams are split and emitted from the non-total reflection film, and the non-total reflection film has a reflectance depending on the area so that the intensity of the plurality of light beams split and emitted is uniform. What they have in common is that they are coated differently. The difference is that in the former, both sides of the light transmitting material are parallel, whereas in the latter, both sides of the light transmitting material are not parallel. The difference is that in the former, multiple light beams are divided and emitted in parallel, whereas in the latter, multiple light beams are divided and emitted in such a way that the distance between the beams gradually approaches each other as they move away from the light beam splitter. It appears as a difference between

[Problems to be Solved by the Invention] Therefore, when using the light beam splitter disclosed in Japanese Patent Publication No. 122135 of 1972, each beam of the light beam split into a line parallel by the light beam splitter is It is necessary to secure the required gap between them. If this gap is not secured, a crosstalk phenomenon will occur during independent modulation of each beam in a multi-channel ultrasonic modulator installed later. In other words, the acoustic wave electrodes not only drive the respective light beams, but also drive the light beams on both sides. After being split into parallel lines by the light beam splitter, each light beam is independently modulated by the multi-channel ultrasonic modulator, and the light beams are immediately focused into a small size by a crystal optical system and transferred to a storage material. It is not possible to perform light exposure, and it is necessary to narrow the beam spacing using an optical fiber or a group of mirrors so that Gaussian diameter circles of adjacent light beams are chained with some overlap, and then a crystal optical system is used to narrow the beam spacing. , was irradiated onto the recording material.

Therefore, a large space is required between the multi-channel ultrasonic modulator and the crystal optical system for arranging the mirror group and arranging the optical fibers, and these adjustments require a high degree of skill and a lot of time. It was both necessary and extremely troublesome.

On the other hand, when using the light beam splitter disclosed in Japanese Patent Publication No. 10713 of 1982, multiple light beams are split in a line at intervals by the light beam splitter, and are split into multiple channels. After independently modulating each beam with a shaped ultrasonic modulator, it is possible to immediately narrow down the beam using a crystal optical system and expose the storage material.
It is superior to 2nd year No. 122135. This is because, as described above, the distance between the plurality of light beams gradually approaches each other as they move away from the light beam splitter. however.

Problems remain when independently modulating a large number of optical beams for each beam using a multichannel ultrasonic modulator. That is, since the multiple light beams are not parallel, the modulation efficiency 2 of the modulator may be reduced and leakage light may occur.Furthermore, it is difficult to form the acoustic wave electrodes of the modulator, and it is difficult to split the light beams. It is difficult to maintain the intersection angle and thickness of both sides of the device at predetermined values with ultra-high precision, making the manufacture of the modulator extremely difficult. If the intersection angle and thickness of both surfaces of the light beam splitter differ even slightly, the condensing distances of the multiple light beams will differ greatly.

It is inevitable that the installation spacing between the optical beam splitter and the modulator, and the installation spacing between the modulator and the crystal optical system X, differ from device to device.

Furthermore, the light beam splitter disclosed in Japanese Patent Publication No. 122135 of 1972 and the light beam splitter disclosed in Japanese Patent Publication No. 107 of 1982 are disclosed.
The practical limit for all of the No. 13 optical beam splitters is to split one optical beam into approximately 20 trees. It is not possible to increase the resolution by increasing the number of divisions any further.If the number of 0 divisions is made larger than about 20, there is a risk that heat will be generated within the modulator crystal, resulting in a lack of heat resistance and durability. Furthermore, in the light beam splitter disclosed in Japanese Patent Publication No. 122135/1973, if the number of divisions is increased, the optical crystal system must be made larger.

The present invention can double the number of beam divisions compared to the conventional method, resulting in high resolution, and can independently modulate each optical beam without causing a crosstalk phenomenon in a multichannel ultrasonic modulator. , there is no need to make the multi-channel ultrasound modulator and optical crystal system installed after the optical beam splitter larger than before, and there is no need to install mirror groups or optical fibers between the multi-channel ultrasound modulator and the optical crystal system. It is an object of the present invention to provide a light beam splitting method and a light beam splitting modulation method that are small, simple, and easy to assemble and adjust without being exposed to acid.

[Means for Solving the Problems] The light beam splitting method of the first invention of the present application has a total reflection film partially coated in a band shape on one surface of a light transmission material, and a total reflection film coated on the other parallel surface. In a light beam splitter having a 50% reflective film partially coated in a band shape, a plurality of light beams with uniform intensity and a required pitch are arranged so that the Gaussian diameters of adjacent light beams do not overlap. Light beams arranged parallel to each other in a row of planes are incident at a required angle, and 50% of each light beam is
% of the intensity is emitted in parallel in a line, and the remaining 50% of the light beam that is internally reflected against the 50% reflective film is reflected by the total reflection film to reflect the 50% again.
50. The light is emitted in parallel in a line from the uncoated part of one surface of the light transmission material coated with the reflective film, and the light is emitted from the uncoated part.
A plurality of light beams are arranged such that the row of light beams having an intensity of % is spaced apart from the row of light beams having an intensity of 50% and is shifted by approximately half a pitch from the row of light beams having an intensity of 50% emitted from the 50% reflective film. It is characterized by being divided into twice the number of lines in a staggered arrangement.

The light beam splitting method of the second invention of the present application is as follows.

A total reflection film on one side of the mutually parallel surfaces of the light transmission material,
In the first light beam splitter, the other surface is coated with a non-total reflection film so that the reflectance varies depending on the area.
A single light beam is incident and internally reflected, and the non-total reflection film creates a plurality of light beams parallel to each other with uniform intensity in a row and separated from each other so that the Gaussian diameters of adjacent light beams do not overlap. The light beams having the required pitch are divided and emitted, and then the divided and emitted plurality of light beams are arranged in a line,
a second light beam splitting having a partially band-coated total reflection coating on one side of the light transmitting material and a partially band-coated 50% reflection coating on the other parallel side; A light beam of 50% intensity enters the chamber at a required angle and is emitted in parallel from the 50% reflective film in a line, and the remaining 50% is internally reflected against the 50% reflective film. The intense light beam is reflected by the total reflection film, and then emitted in parallel in a line from the uncoated part of one side of the light transmission material coated with the 50% reflection film. A row of light beams with an intensity of 50% emitted from the above-mentioned 5
Dividing the plurality of light beams into twice the number in a staggered arrangement with a required spacing and approximately half a pitch with respect to the row of light beams with 50% intensity emitted from the 0% reflection film. It is characterized by:

A light beam splitting method according to the third invention of the present application is as follows.

in a light beam splitter having a partially band-coated total reflection coating on one side of the light transmitting material and a partially band-coated 50% reflection coating on the other parallel side. , a plurality of light beams with uniform intensity and arranged parallel to each other in a plane at a required pitch are spaced apart so that the Gaussian diameters of adjacent light beams do not overlap, and are incident at a required angle to generate a nucleus. 50% each from 50% reflective film
% of the intensity is emitted in parallel in a line, and the remaining 50% of the light beam that is internally reflected against the 50% reflective film is reflected by the total reflection film to reflect the 50% again.
A line of light beams with an intensity of 50% is emitted from the uncoated part of one side of the light transmission material coated with a reflective film in a line in parallel, and is emitted from the uncoated part. The plurality of light beams are divided into twice the number of light beams in a staggered arrangement at a required interval and shifted by approximately half a pitch with respect to the row of light beams of 50% intensity emitted from the 50% reflection film. Next, two multi-channel ultrasonic modulators were installed, each of which had acoustic wave electrodes located perpendicular to each light beam to independently modulate the light beams, corresponding to the number and pitch of the light beams. The ultrasonic modulators are arranged close to each other with the electrodes on the outside, and one of the ultrasonic modulators has five ultrasonic waves emitted from the 50% reflection film.
A train of light beams with an intensity of 0% is passed through the other multi-channel ultrasonic modulator, and a train of light beams with an intensity of 50% emitted from the uncoated portion is passed through the other multi-channel ultrasonic modulator based on the image signal. The system is characterized in that each of these light beams is independently modulated, and the light beams in one row are modulated through delay processing.

A light beam splitting method according to a fourth invention of the present application.

A total reflection film on one side of the mutually parallel surfaces of the light transmission material,
In the first light beam splitter, the other surface is coated with a non-total reflection film so that the reflectance varies depending on the area.
A single light beam is incident and internally reflected, and the non-total reflection film creates a plurality of light beams parallel to each other with uniform intensity in a row and separated from each other so that the Gaussian diameters of adjacent light beams do not overlap. The light beams having the required pitch are divided and emitted, and then the divided and emitted plurality of light beams are arranged in a line,
a second half-beam splitter having a partially band-coated total reflection coating on one side of the light transmitting material and a partially band-coated 50% reflection coating on the other parallel side; A light beam that enters the vessel at a required angle and has an intensity of 50% is emitted from the 50% reflective film in parallel in a line, and the remaining 50% of the intensity is internally reflected against the 50% reflective film. The light beam is reflected by the total reflection film and emitted in parallel in a line from the uncoated part of one side of the light transmission material coated with the 50% reflection film, and the uncoated part A row of light beams with an intensity of 50% emitted from the 50%
The plurality of light beams are divided into twice the number in a staggered arrangement at the required intervals and shifted by approximately half a pitch with respect to the row of light beams with 50% intensity emitted from the % reflection film, and then A sonic electrode is positioned at right angles to each light beam and independently modulates the light beam. The ultrasonic modulators are arranged close to each other so as to be on the outside, and one of the ultrasonic modulators has five ultrasonic waves emitted from the 50% reflection film.
A train of light beams with an intensity of 0% is passed through the other multichannel ultrasonic modulator, and a train of light beams with an intensity of 50% emitted from the uncoated portion is passed through the other multichannel ultrasonic modulator based on the image signal. The system is characterized in that each of these light beams is independently modulated, and the light beams in one row are modulated through delay processing.

[Example: Figures 1 to 4] This example is common to the first to fourth inventions of the present application, and an argon laser is divided into a row of Yagis on a gravure plate-making roll coated with a photosensitive film. Further, the light beams are divided into two rows of 16 trees, each of these light beams is independently modulated based on the halftone image signal, and one of the light beam rows is delayed in accordance with the phase shift and sent as a signal. This is a direct exposure device that focuses a beam using a crystal optical system, exposes a rotating gravure plate-making roll coated with a photoresist, and scans and moves in the longitudinal direction of the surface.

Number 1 is a plate-making roll, which is chucked at both ends by a pair of rotating chucks and rotated at high speed.

Reference numeral 2 denotes an X table, which is movable in the longitudinal direction of the plate-making roll 1 in accordance with the rotation of the plate-making roll 1. Reference numeral 3 denotes a Y table, which is provided on the X table 2 and can be moved toward and away from the plate-making roll l by means of a control motor 4.

This device transmits a light beam (laser beam) from a fixedly installed argon laser (not shown) to a total reflection mirror 5 provided on an X table 2 and a total reflection mirror 6 provided on a Y table 3. 7, bent by Y table 3
the first beam splitter 8 provided above;
The light beam splitter 8 splits the light beams into eight light beams arranged in parallel on a horizontal plane, and the second light beam splitter 9 installed on the Y table 3 splits the light beams into eight light beams arranged in parallel on a horizontal plane. The beam is divided into 16 optical beams arranged in two rows, and then the ultrasonic wave modulator 10 is divided into 16 optical beams arranged in two rows.
．． 11, modulation is controlled independently based on the halftone image signal, the crystal optical system 12 narrows down the beam to a small beam diameter, and the autofocus lens 12a focuses the beam onto the plate-making roll 1 coated with a photoresist film. Scanning exposure is carried out according to the movement of 2.

The light beam splitting method of the first invention of the present application includes a light beam splitter 9
It is specified that a plurality of light beams in a line are divided into two lines with each party beam being separated by a half pitch using the method, and the light beam splitting method of the second invention of the present application is the optical beam splitter 8
After splitting one light beam into a plurality of beams using a light beam splitter 9, each light beam is split into two lines into two lines shifted by a half pitch from each other. The light beam splitting modulation method of the third invention of the present application uses a light beam splitter 9 to split a plurality of light beams in a row into two beams, each separated by a half pitch. After splitting into two rows, the rows are divided and guided to a multi-channel ultrasonic modulator 10.11, and each light beam is independently modulated and controlled. This is the fourth invention of the present application. The light beam splitting modulation method uses a light beam splitter 8 to split a single light beam into a plurality of light beams, and then uses a light beam splitter 9 to split each light beam into two. After dividing into two rows shifted by half a pinch from each other, the rows are divided and a multi-channel ultrasonic modulator to,
tt and independently modulating and controlling each light beam.

The optical beam splitter 8 is disclosed in Japanese Patent Publication No. 122 of 1972.
It is equivalent to the optical beam splitter No. 135. That is,
The light beam splitter 8 is formed by coating a total reflection film 8b on one side of both parallel surfaces of a light transmission material 8a, and coating a non-total reflection film 8C on the other side so that the reflectance varies depending on the area. .

The light beam splitter 8 is provided so as to be inclined by an angle α with respect to the light beam reflected from the total reflection mirror 7. The angle α is such that the interval between the light beams split and emitted from the non-total reflection film 8C is the same as the pitch (for example, 1.5
mm). Thus, the light beam splitter 8 allows the single light beam reflected from the total reflection mirror 7 to enter from the end 8C on the incident side surface of the splitter where the total reflection film 8b is not coated. , internal reflection is repeated between the non-total reflection film 8C and the total reflection film 8b,
From the exit type surface coated with non-total reflection film 8C,
It is designed to emit a light beam of equal amount of light from Yagi in parts. The non-total reflection film 8C has a first emission area that captures 1/8 of the incident light, then 1/7 of the internally reflected light, then 1/8 of the internally reflected light, and then 175% of the internally reflected light. , next, 1/4 of the internally reflected light, next 173 of the internally reflected light, and next, 1/2 of the internally reflected light are passed through, respectively, with different reflectances depending on the seven emission areas. It is said to be a membrane,
Finally, the output region is not coated with a reflective film because the internally reflected light beam becomes 1/8 of the light intensity of the initially incident light and the entire amount needs to be emitted.

The light beams of equal light intensity from Yagi, which are divided and emitted from the light beam splitter 8, enter the light beam splitter 9, where each beam is split into two beams arranged in the same manner as each other. It becomes a light beam and is emitted in parts.

As shown in FIG. 2, the light beam splitter 9 is inclined at a relatively large angle β (for example, 45°) with respect to a plane orthogonal to the incident Yagi light beam. and,
The light beam splitter 9 has a total reflection film 9b partially coated in a band shape on one side of the light transmission material 9a;
The Yagi light beam split by the light beam splitter 8 is
The light is incident on the lower side of the total reflection film 9b, and the other surface of the light transmission material 9a is parallel to the surface coated with the total reflection film 9b, and is partially coated in a band shape. There is a 50% reflective film 9C, and the 50% reflective film 9C is different from the total reflective film 9b with respect to the light transmission material 9a.
The total reflection film 9b transmits half of the eight beams of light that enter the lower side and travel inside, and transmits the remaining half of the light amount to the total reflection film 9b.
reflect it towards. A light beam traveling inside the light transmission material 9a toward the total reflection film 9b is reflected by the total reflection film 9b and transmitted through the upper side of the 50% reflection film 9C on the opposite surface.

Therefore, the light beam splitter 9 makes the eight light beams enter the lower side of the total reflection film 9b, and divides each beam into upper and lower halves so that each beam has a light intensity of 50%. Yagi's light beam is emitted from 9C and 50%
A Yagi light beam is emitted from above the reflective film 9C.

The light beam splitter 9 is tilted at a small angle γ in the direction along the row of eight incident light beams, as shown in FIG. For this reason, the emission positions of the eight light beams in the upper row (emitted from above the 50% reflective film 9C) that are emitted from the light beam splitter 9 undergo internal reflection. 9C) is shifted laterally to a greater extent than Yagi's light beam. Therefore, by finely adjusting the angle γ, the emission position of the upper row of Yagi's light beams emitted from the light beam splitter 9 is set to be larger by half a pitch laterally than the emission position of the eight light beams of the lower row. Hezrasu.

The light beam having an equal amount of light divided into 16 pieces by the light beam splitter 9 enters a ha-channel type ultrasonic modulator 10.11 which is stacked in two layers with a gap of, for example, 1.0 mm. . The upper modulator 10 receives the eight light beams in the upper row emitted from the light beam splitter 9, and the lower modulator 11 receives the Yagi light beams in the lower row. Modulator 1
0 are provided with sound wave electrodes 10a to 10 for oscillating ultrasonic waves for independently modulating each party beam, and
Sonic electrodes 11a to 11h are provided on the lower surface of the modulator 11 to oscillate ultrasonic waves for independently modulating each party beam. These sound wave electrodes 10a to 101t, lla to
11) 1 is provided on a side surface perpendicular to the light beam passing through the modulator and perpendicular to each party beam, and independently modulates each party beam based on the image signal. The relative relationship between the beam diameter of the light beam, the size of the sonic electrode, and the electrode spacing is, for example, the beam diameter is 0.8 mm, the sonic electrode size is 1.0 mm, and the electrode spacing is 1.5 mm.

The Yagi light beam that passes through the upper modulator 10 and the Yagi light beam that passes through the lower modulator 11 are out of phase with respect to the gravure plate making roll 1 that is the recording material. Therefore, when the gravure plate-making roll l rotates in the direction of the arrow, the sound wave electrodes 11a to 11h of the lower modulator 11
: Sends a modulated signal with necessary delay processing applied to it. As a result, as shown in FIG. 4, the light beam of Yagi, which has been modulated in advance by the upper modulator 10, is applied to the gravure plate making roll 1 in a row with eight drums (13a to 1) spaced apart from each other.
3 is first exposed, and then, at the super instant when the gravure plate-making roll 1 rotates by the amount of the phase shift, Yagi's light beam modulated and controlled by the lower modulator IO is used to expose the gravure plate-making roll 1 in a line. 8 dora spaced apart) 14a-
When 14 is exposed, these dots 14a-14 are shifted by half a pitch from the previously exposed dots 13a-13, and overlap in a line.

Therefore, these sound wave electrodes 10a to 10) L, lla to
Send a modulation signal based on the image signal to tth,
Moreover, if the timing of sending the modulation signal to the sound wave electrodes 11a to 11K is delayed in response to the phase shift,
A halftone image can be exposed on the gravure plate making roll 1.

[Effects of the Invention] As explained above, the light beam splitting method and the light beam splitting modulation method of the present invention have the following effects.

■The number of beam divisions can be doubled compared to conventional systems, allowing high-resolution exposure.

(2) Each optical beam can be modulated independently in a multi-channel ultrasonic modulator without causing crosstalk phenomena.

■Although the number of beam divisions is twice that of the conventional one, there is no need to make the multi-channel ultrasonic modulator and optical crystal system larger than the conventional one.

■There is no need to provide a mirror group or optical fiber between the multi-channel ultrasonic modulator and the optical crystal system, making it compact and simple, and easy to assemble and adjust.

[Brief explanation of the drawing]

The drawings are shown as an embodiment common to the light beam splitting method and the light beam splitting modulation method of the first to fourth inventions of the present application.
Regarding a direct laser exposure device for gravure plate making rolls, Fig. 1 is a plan view, Fig. 2 is a view taken from the arrow ■ in Fig. 1, and Fig. 3 is a view taken from the arrow ■ - ■ in Fig. 1. It is a view seen from the arrow. FIG. 4 is a diagram showing the arrangement of light beam dots on a recording surface, showing a state in which two rows of 16 light beams are exposed on a recording material in a line. 1mm plate making roll, No.2...X table, 3.Fist/Y table, 4.11*control motor, 5.6,7...total reflection mirror, 8...light beam splitter, 8a... -Light transmitting materials. 8b... Total reflection film. 80...Non-total reflection film, 9.Fist/light beam splitter, 9a-Ichiban/light transmission material, 9b-...total reflection film, 9C...50% reflection film, 10.11...To the meeting Channel type ultrasound modulator, 10'
a-10h:, lla ~1th*Sound wave electrode, 12・
・Crystal optical system, 12aaII・autofocus lens. 13a-13) 1.14a - 14h... Exposure dots on the recording surface of the light beam, Applicant: Think Lab Co., Ltd. - Figure 2 β Figure 3 Figure 4

Claims (4)

[Claims] (1) Light beam splitting having a total reflection coating partially coated in a strip on one side of the light transmitting material and a 50% reflection coating partially coated in a strip on the other parallel surface. A plurality of light beams with uniform intensity and arranged parallel to each other in a plane at a required pitch so that the Gaussian diameters of adjacent light beams do not overlap are incident on the device at a required angle. Then, the 50% reflective film emits light beams of 50% intensity in parallel in a line, and the remaining 5 light beams are internally reflected against the 50% reflective film.
A light beam with an intensity of 0% is reflected by the total reflection film, and then emitted in parallel in a line from the uncoated part of one side of the light transmission material coated with the 50% reflection film, and the coating The row of light beams of 50% intensity emitted from the unprotected portion is spaced apart from the row of light beams of 50% intensity emitted from the 50% reflective film by a required distance and shifted by approximately half a pitch. A light beam splitting method characterized by splitting a plurality of light beams into twice the number of light beams in a staggered arrangement. (2) A first light beam splitter formed by coating a light transmission material with a total reflection film on one side of the parallel surfaces and a non-total reflection film on the other side so that the reflectance varies depending on the area. A single light beam is incident on the inside and reflected internally, and the non-total reflection film allows the Gaussian diameters of multiple parallel light beams with uniform intensity in a row and adjacent to each other to not overlap with each other. The light beams are separated and emitted at a required pitch, and then the divided and emitted plurality of light beams are coated with a total reflection film partially coated in a strip on one surface of the light transmission material. incident at a desired angle into a second light beam splitter having a 50% reflective coating partially strip-coated on the other parallel surface,
% reflection film to emit light beams of 50% intensity in parallel in a line, and the remaining 50% intensity light beam that is internally reflected to the 50% reflection film is reflected by a total reflection film, Again, a line of light beams with 50% intensity is emitted from the uncoated part of one side of the light transmission material coated with the 50% reflective film in a line in parallel, and is emitted from the uncoated part. but,
The plurality of light beams are divided into twice the number in a staggered arrangement at a required interval and shifted by approximately half a pitch with respect to the row of light beams of 50% intensity emitted from the 50% reflection film. A light beam splitting method characterized by: (3) Optical beam splitting having a total reflection coating partially coated in a band on one side of the light transmitting material and a 50% reflection coating partially coated in a band on the other parallel side. A plurality of light beams with uniform intensity and arranged parallel to each other in a plane at a required pitch so that the Gaussian diameters of adjacent light beams do not overlap are incident on the device at a required angle. Then, the 50% reflective film emits light beams of 50% intensity in parallel in a line, and the remaining 5 light beams are internally reflected against the 50% reflective film.
A light beam with an intensity of 0% is reflected by the total reflection film, and then emitted in parallel in a line from the uncoated part of one side of the light transmission material coated with the 50% reflection film, and the coating The row of light beams of 50% intensity emitted from the unprotected portion is spaced apart from the row of light beams of 50% intensity emitted from the 50% reflective film by a required distance and shifted by approximately half a pitch. The plurality of light beams are divided into twice the number of light beams in a staggered arrangement, and then a sonic electrode positioned at right angles to each light beam and independently modulating the light beams is arranged to adjust the number and pitch of the light beams. Two correspondingly equipped multi-channel ultrasonic modulators are arranged adjacently in parallel with the sound wave electrodes facing outward, and one ultrasonic modulator has a 50% reflection film that emits light from the 50% reflection film.
A train of light beams with an intensity of 0% is passed through the other multi-channel ultrasonic modulator, and a train of light beams with an intensity of 50% emitted from the uncoated portion is passed through the other multi-channel ultrasonic modulator based on the image signal. A light beam division modulation method characterized in that each of these light beams is modulated independently, and the light beams in one row are modulated by subjecting them to delay processing. (4) A first light beam splitter comprising a total reflection film coated on one of the mutually parallel surfaces of a light transmission material and a non-total reflection film coated on the other surface so that the reflectance varies depending on the area. A single light beam is incident on the inside and reflected internally, and the non-total reflection film allows the Gaussian diameters of multiple parallel light beams with uniform intensity in a row and adjacent to each other to not overlap with each other. The light beams are separated and emitted at a required pitch, and then the divided and emitted plurality of light beams are coated with a total reflection film partially coated in a strip on one surface of the light transmission material. incident at a required angle into a second light beam splitter having a 50% reflective coating partially strip-coated on the other parallel surface, and having a 50% reflective coating partially band-coated on the other parallel surface.
The light beams with 50% intensity are emitted in parallel from each reflective film in a line, and the remaining 50% light beams that are internally reflected against the 50% reflective film are reflected by the total reflection film and then reflected again. A light beam of 50% intensity is emitted from the uncoated part of one side of the light transmission material coated with the 50% reflective film in a line in parallel. , dividing the plurality of light beams into twice the number in a staggered arrangement with a required spacing and approximately half a pitch with respect to the row of light beams of 50% intensity emitted from the 50% reflection film; Then, two multi-channel ultrasonic modulators were installed, each of which had acoustic electrodes positioned perpendicular to each light beam and independently modulating the light beams, corresponding to the number and pitch of the light beams. The ultrasonic modulators are arranged in close proximity with the acoustic wave electrodes on the outside, and one of the ultrasonic modulators has five ultrasonic waves emitted from the 50% reflection film.
A train of light beams with an intensity of 0% is passed through the other multi-channel ultrasonic modulator, and a train of light beams with an intensity of 50% emitted from the uncoated portion is passed through the other multi-channel ultrasonic modulator based on the image signal. A light beam division modulation method characterized in that each of these light beams is modulated independently, and the light beams in one row are modulated by subjecting them to delay processing.