Magnetic Closure Boxs For Shoes The mystery of holographic imaging technology in prepress field

Magnetic Closure Boxs For Shoes The mystery of holographic imaging technology in prepress field

Speaking of holographic technology, people will immediately think of holographic three-dimensional images or laser anti-counterfeiting images with color patches. In fact, the application of holographic technology is much more than that. For example, bar code scanners in supermarkets also use this technology. It is worth mentioning here that Holotek has been committed to the development of holographic imaging technology for 18 years, and has more than 15 US patents in this area, and its product applications include laser phototypesetters and direct plate making systems, xerographic systems, X-ray systems, semiconductor manufacturing flaw detection equipment and image recording systems for film shooting. Holotek was acquired by ECRM in 1996, bringing these patented technologies into ECRM's product portfolio. Now the optical components using holographic technology have been applied to the ECRM series of laser phototypesetters and direct platemaking machines, and have been successful in the market. This is due to the precise imaging characteristics of the holographic system, which makes the image output speed and image quality achieve perfect unity.

The secret to super-fast holographic imaging

Compared with other laser phototypesetters, the output speed of laser phototypesetters using holographic technology can reportedly reach 72 inches/minute, in fact, there is still potential to further improve the speed of holographic imaging.

Despite the exponential increase in imaging speed using holographic technology, the imaging system itself does not look particularly impressive. The core component of the system consists of a holographic refractor, which looks like a thickened ordinary optical disc with its surface divided into five or six parts. Like a traditional rotating mirror, a holographic refractor is a mechanism that allows a laser beam to scan onto a light-sensitive material. The faster the scanning mirror rotates, the faster the phototypesetter can image. However, the speed of a simple specular reflection system is limited by the speed of the scanning motor.

In the holographic imaging system, the method to improve the imaging speed is to decompose the light beam, so that the scanning motor can generate multiple scanning lines per rotation. This effect can also be achieved by using a multifaceted prism system, but the balance of operation of the latter is difficult to control, which adversely affects the accuracy of imaging.

The holographic refractor is a positive disk, so it can remain stable when rotating at high speeds. The circular direction of the disk is lined with dense gratings, up to 5,000 gratings per inch. The whole grating plate is divided into multiple sectors, just like a cake is cut into several portions. When the holographic optical mirror is rotated, each sector passes through the laser beam, which is refracted through the grating surface and scanned onto the imaging material. Each sector of the grating disk can generate a beam of scan lines, so the 5-sided grating disk can generate 5 beams of scan lines per rotation. In contrast, simple specular reflection systems can only produce a single beam of scanning lines. The more sectors on the grating disk, the faster the image will be

Holographic imaging technology makes the image quality better

The essential difference between the holographic imaging system and the ordinary mirror reflection system is that the latter changes the light path by reflecting the light beam, while the holographic system makes the light beam reach the imaging surface through the refractor. Due to the limitations of the manufacturing process, any mirror can not be absolutely flat, the imaging of the reflection system will be biased, if the speed of the mirror is increased, this deviation will be aggravated, even small errors will be amplified by the mirror reflection system; In the holographic imaging system, the imaging error can be reduced because the beam is refracted rather than reflected.

In addition, due to the unbalanced structure of the mirror itself, it is easier to vibrate when rotating at high speed, so for the reflection system, a problem that needs to be solved is to find a way to compensate the scanning path error. The optical path of the holographic refractor is not sensitive to jitter, which simplifies the structure of the optical system. Therefore, holographic imaging systems can provide a higher guarantee in terms of optical path accuracy. In fact, the ECRM Tiger Cat series direct platemaking system with holographic imaging technology is designed for high-precision commercial printing customers.

Holography and Titanic

Titanic, one of the most expensive films in film history, relied on special effects for many of its grand scenes. Holography has been instrumental in making these special effects manifest on screen. In fact, the Hollywood film industry is using holographic imaging technology to record images on film. Such films include Batman & Robin and Enemies of the State. In addition to the film industry, in other industries including the printing industry, there are many manufacturers are also using this technology, including Agfa, DuPont, Kodak, 3M, Monotype, WesternLitho, Xerox and other manufacturers.

The future of holographic imaging technology

Holographic technology has reduced the cost of optical components, and the intervention of holographic technology has greatly changed the face of the printed image field. In the near future, we will find that laser imaging is faster than film transmission, and manufacturers may need to redesign their equipment to improve the speed of mechanical delivery of imaging media.

There is still some way to go to further develop the performance of holographic imaging technology. Although the current grating disk has only 5 or 6 sides, simply increasing the number of grating planes will make the device too large, and it is not easy to overcome the influence of the air flow when the grating disk is rotating at high speed, and further development of holographic imaging technology will continue.