DPSS Lasers Inc.
Www.ILPhotonics.com on DPSS Lasers Inc.
2011Presentation
UV Lasers & Applications
DPSS Lasers Inc. – Santa Clara, CA
DPSS Shanghai(Pudong)
DPSS Lasers Inc - History Since 1972, DPSS and our former company LiCONiX have been building UV laser systems.
As LiCONiX, we delivered over 25,000 Blue and UV HeCd gas lasers.
Sold LiCONiX’s gas laser group to Melles Griot in 1998. Spun-off the engineering and solid state laser group to form DPSS Lasers Inc.
Many current DPSS employees were managers or senior employees of LiCONiX.
Same Board of Directors as the former LiCONiX, with the addition of Alex Laymon.
Why DPSS Lasers Inc
We specialize in the manufacturing of DPSS UV lasers. This is our only product.
We are the world’s largest supplier of DPSS UV lasers in StereoLithography.
Because of our volume and efficient design, we are the low-cost leader for UV systems around the world.
Why DPSS Lasers Inc
Patents - We hold patents on DPSS IntraCavity UV lasers in US, Japan, UK and Germany (US PAT# 6,002,695)
Over 1600 DPSS UV lasers have shipped and are in use in 23 countries.
Developed first DPSS IntraCavity UV laser in 1992. Shipped first DPSS UV laser in 1998.
Why DPSS Lasers Inc
We ship 5 to 15 DPSS UV lasers per week.
We keep 30+ UV lasers in stock at all times.
Most orders for new or service lasers ship same day.
Why DPSS Lasers IncOver the years, many top-tier, Global companies have relied on DPSS Lasers Inc. to process their materials.
Abbott Labs
3M
Medtronic
Boeing
Sony
US Army
Baxter
Delphi
Ford
GM
3D Systems
Gentex
Honeywell
Intel
Apple
Lockheed
Molex
PPG
Roush
Siemens
IBM
Texas Instruments
Customer Application – Does it Need a Laser?
Need to Get Rid of Labels, Ink, Glue – Lack of Durability Cannot Clean Contamination Reasons Short term Consumable Pricing per piece is too high
Precision Need Fine Features or High DPI
Permanent – Security. No Changing.
Need for an Eco-Friendly Process
Laser Application – IR versus UV
LasersIR Lasers – These lasers mark by heat and thermal changes of materials.
CO2 – wavelength 10,600 nm. Least expensive. All marks done by heat with material damage. (Paint Sprayer)
Solid State – wavelength 1064 nm. Moderate costs, with good life. Marks done with heat with 10X smaller spot than CO2. (Paint Roller)
Fiber Lasers – wavelengths 800-1000 nm. Moderate costs, with long life. All marks still with heat, and slightly smaller spot sizes.
UV Laser – Lasers mark by Photo-chemical changes and/or photo-ablation of materials.
Wavelength of 355 nm. Slightly higher cost with good life. (Painting with fine tip brush) The advantages of UV lasers are minimal heat effected zones and smaller feature sizes. (30X smaller spot than CO2)
UV lasers are often referred to as “Cold Lasers.”
Why UV versus IR Lasers
Applications that were previously inaccessible to laser technology are also opening up with the aid of UV DPSS lasers.
IR marks on many plastics are controlled melts with variable contrast.
UV marks are usually high contrast, with minimum or no damage due to the photochemical effect of the UV photon on the material in process.
Lower Power levels needed - A 10 um dia, 1 Watt UV beam has same power density as a 100 um dia, 100 Watt CO2 Laser
Why UV versus IR
UV Mark on left, IR mark on right.
Notice clean sharp IR mark is uneven
edge of UV Mark and melted
Will UV benefit my application?
DPSS Lasers Inc has a free applications lab in Santa Clara CA.
The customer can either send their samples or visit in person to evaluate the UV difference.
If a picture is worth a thousand words, an actual UV-processed sample is worth a thousand pictures.
DPSS Lasers encourages the customer to send your samples and your NDA.
3500 Series – UV 355 nm Laser System
Samurai UV Marker
First laser marking system specifically designed for UV lasers.
Takes advantage of the short UV wavelength to provide a small spot size and a large depth of focus.
Takes advantage of the “cold” marking process not requiring high average powers and allowing damage free marking on many materials.
Samurai UV Marker Features
Cold UV Marking
Very easy To Use Software
Fast Scanning Speeds
Proven Scanning Technology
Integrated UV Laser Marking Solution
< 700 Watt Single Phase Utility Required
Field Proven Model 3500 Series 355 nm Laser
Materials Can Be Marked, Engraved, Scribed, Cut Or Drilled.
Samurai UV marker
Samurai – Top
Custom Samurai Top Plate
Samurai Special“Out Front” Beam
Wire Marking System – Integrator/OEM
Wire Marking System – Integrator/OEM
UK Integrator
Opto-Systems Japan
Sapphire Scribing – Blue LED
Shanghai UnionRP OEM China
UV Laser Success StoriesMedical Device Company 1 - Heart Implant
Skiving insulation from 200 um wire for lead attachment.
Medical Device Company 2 - Multiple systems
Marking plastic devices Conventional printing and labels do not hold up to continuous cleaning.
Energy Company – Fuel/Energy Cell production
Drill tens of thousands of holes in thin membrane.
181 Engineering – Contract Development in Silicon Valley.
Remove Teflon coating from tips of neurological probes.
NanoDynamics – Material Studies
Ablate materials in vacuum chamber for research.
UV Laser Success Stories
Company A - Major glass and film manufacturing
Samurai base mounted over production line for making film on the fly.
Gentex- Automotive application
Remove thin-film metallic coatings from backside of rearview mirrors.
Medical Device Company 3 - Biomedical Implant
Samurai to remove epoxy coating from contact leads of sub-millimeter device. No damage to device.
Wire marking for Commercial and Military Aircraft.
In spring of 2006, FAA mandated that all wires in M&C aircraft must be marked with UV laser or each mark must be tested and certified post process. Permanent mark and no damage.
Worldwide Laser - Major cosmetic company switching over from CO2 to UV due to better and faster marking of many plastics.
Why UV versus IR
For more information on DPSS UV lasers and laser marking applications, please visit our website at
http://www.dpss-lasers.com/Samurai.html
Intra Cavity Layout
Marking Distance
Waist Size (FWHM)
Depth of Focus±
10 %Mark Field Diameter
[mm] [μm] [mm] [mm]
60 6.6 0.24 10.7
80 8.6 0.41 16.2
100 10.7 0.66 23
120 12.7 0.89 29
150 15.8 1.38 41
200 21 2.4 62
250 26 3.7 86
300 31 5.3 113
400 41 9.3 174
500 51 14.4 240
Waist size
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General Laser Safety
Eye Safety UV Beam – Cannot see, unless it hits
something!! Wear Eye Protection – Yes Extra Care when wearing eye protection
Skin Protection – Not needed.
Electrical Safety – This is biggest risk. Solid State Lasers – Low voltage, high
current. Less risky, but still up to 700 Watts.
Fire Risk – Solid State Laser output can ignite paper and plastic materials – Be Careful.
Rep Rate vs. Power, Pulse Width, & Pulse Energy
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Energy Limited Area
At repetition rates below 30kHz, the pulse width and pulse energy of the laser is internally limited to the values received at 30kHz (see shaded area of graph). As the repetition rate goes lower than 30kHz, the average power drops linearly since the pulse energy is held constant and the time between pulses is increasing with reduced repetition rate. This feature is implemented to reduce the risk of high peak power pulses causing damage to internal laser optics.
3500 Series – Power vs Rep Rate Chart(Discussion for Integrators and Users)
APPLICATIONS
All of the following materials have all been processed with DPSS 355 nm laser systems.
Pictures:
Stainless Steel – Tube 1 inch Dia.
Medical - Stainless Steel Rods
Stainless and Drill Bit
Brass – Tube 1 inch Dia.
Gold – Character height 0.3 mm
Look between “LI” of “LIBERTY”
Black Plastic (Acetal) – Piece 1 inch wide
PCB Blue – 0.75 inch tall piece
Silicone Tubing
Coating Removal – Lines 25 micron wide
Medical Tubing
Wire/Cable Marking
Black Tubing
Small Electronic Components
Sapphire Scribing for LED – 6 micron Lines
Plastics
White Plastic – Barcode height 3 mm
HDPE Bottle
Electronic Housings – Upper set is paint.Lower set was DPSS 355 nm laser.
Hands-Free Device
White & Black Plastics
White Plastic
