UV Printheads
 
UV Photoexposure Products
Optotek's linear UV LED arrays are intended for UV exposure applications, including the curing of photosensitive materials and in computer-to-plate and related digital printing applications.



Outline Drawing for
P71-1464 Curebar

CurebarsTM
These UV arrays are modular in design, allowing curebar construction of any desired length. (Examples include 20.5 inch curebars for linear scanning applications and 0.5 inch curebars for dual-axis scanning).

Power outputs range from 2 to 5 watts/sq.cm. (@ 10 mA) at peak wavelengths ranging from 365 to 395 nm. 15 watts/sq.cm. (@ 60 mA) can be achieved with liquid cooling.

LED placement consists of staggered 16 element blocks in two lines with a single LED pitch (0.014 inch) line separation. Novel optical configurations are used to achieve LED line widths of 0.1 inches.

RESOLUTION
COLOR
NO. OF LEDs
ACTIVE LENGTH
APPLICATION
71 dpi
(2.8 dots/mm)
Ultraviolet
1464
20.5 inch
(52 cm)
Cure UV-Sensitive
Materials


  • Average drive current for the 1,464 LED curebar should be limited to about 30 amps (20 mA/LED).

  • An average current of up to 30 Amps can be provided using the transformers shown in this Drive Conditions schedule. This current can be doubled to 60 Amps average using a bridge rectifier for full wave rectification at the output of the secondary of the step-down transformer increasing the power output to 15 W/cm2. Liquid cooling should be used.

  • A center tapped transformer secondary could be used for higher efficiency rectification (one diode drop instead of two).

Mechanical Dimensions: 
Length:   25  inch     (63.5 cm)
Width:    3.7 inch     (9.4 cm)
Height:   1.4 inch     (3.6 cm)
Weight:   15 lbs.      (6.8 kg)



Outline Drawing for
P150-3072 Printhead

Printheads
These UV arrays are modular in design, allowing printhead construction of any desired length. (For examples 20.5 inch printheads for linear scan digital printing - specifications below).

RESOLUTION
COLOR
NO. OF LEDs
ACTIVE LENGTH
APPLICATION
150 dpi
(5.9 dots/mm)
Ultraviolet
3072
20.5 inch
(52 cm)
Digital Printing on UV Sensitive Materials

P150-3072 UV LED Printhead 



Resolution:150 DPI		(5.9 dots/mm)



 



Number of LEDs:3072



 



Active Length:20.5 inch	(52 cm)



 



LED Placement:Staggered 32 element LED groups in four lines with a 0.0133 inch pitch in both coordinate directions					



 



Organization:24 channels of 256 bits each (2 bits/LED) operating at a clockrate of up to 8 MHz for an overall effective bitrate of 192 MHz



 



Power Output:20 mA, 100% display load, 395 nm before uniformity compensation. 50 uw +- 33 % using selfocusing F.O
 SLA - 12A having a focal distance of 14 mm (0.56 inch). 2 mw +- 33% using F.O. faceplate with a numerical aperature NA = 0.66.



 



Drive Current:LED current up to 60mA can be used at reduced display load with corresponding increase in power output.
 Common anolog voltage control of all current sources (0 to 60 mA)



 



Uniformity:Four bit pulse width uniformity compensation using on board plug in EPROM DIPs improves the uniformity to +- 5 % at half the power output



 



Length:25 inch (63.5 cm)




Width:3.7 inch (9.4 cm)




Height:2.4 inch (6.1 cm)




Weight:15 lbs (6.8 kg)



 



Provision for liquid cooling if required by the application.




Other wavelengths available 365 nm to 410 nm.