Lenox Laser Nondestructive Micromarking and Microimaging Technology

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The Lenox Laser Corporation of Glen Arm, Maryland, has recently developed an advanced laser supported technology that can produce nondestructive marks and images with submicron resolution on most materials. If you are concerned about accessibility, traceability, security, encryption, archiving, and risk management, then you may wish to contact Greg Solyar, senior scientist, for more information by calling 410-592-3106 (1-800-494-6537) or by sending an email to engineering@lenoxlaser.com.

Micrometer Thin Precision Marking with Modulation of Contrast

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Marking a variety of materials is one of the strengths of Lenox Laser, Inc. Marking and engraving is required for both industrial and scientific purposes. In industry, marking and engraving is required for accounting and parts discrimination, for making delivery channels in materials for the delivery of liquids and powders, for mechanical engagement of micro-parts, etc. For scientific purposes, when used in the optical systems, precision and methods of marking can be crucial for the whole system performance. In this case, the positioning tolerances and the width and depth of marking define the contrast ratios and ability of the marked parts to serve as fiducials. These fiducials are used to align opto-mechanical systems and to perform telemetry light intensity analysis. Being able to modulate the contrast is a very important task for space born systems similar to the Hubble Telescope where available photon counts are low. NASA commissioned Lenox Laser to fabricate precise crosshair fiducials for the Hubble Telescope.



 

CONTRAST = (BRIGHTEST – DARKEST) / (BRIGHTEST + DARKEST)

 


(where brightest and darkest refer to the intensities of the light reflected from a surface)



 

 

In the case of large differences between brightest and darkest this formula reduces to a simple ratio:

 


CONTRAST RATIO = BRIGHTEST / DARKEST

 


 

Lenox Laser, Inc. has developed a method of maximizing and modulating the contrast of marking for a given material and pattern geometry. The process of alignment and orientation of slits or pinholes in front of the light beam can be simplified by engraving the fiducials on the holder. This technique allow one to engrave lines as wide as a few micrometers with very high or customer requested contrast.

 


Lenox Laser offers different standard or custom shapes of patterns. Negative or positive marking on most opaque and transparent materials are readily available and produced. Marking a periodic structure such as a set of lines spaced with variable or constant period on a surface turns the material into grading or optronic crystal. The efficiency of these devices highly deepens the accuracy and precision of the manufacturing process. It is for this reason the Lenox Laser engineering and production teams are constantly improving their tools and processing methods.

 

Laser Marking the Key to the City

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First Recipient of Washington D.C.'s newest Key:  Republic of South Africa President, Thabo Mbeki
First Recipient of Washington D.C.’s newest Key: Republic of South Africa President, Thabo Mbeki

A consortium of technology companies has come together to produce a new take on Washington D.C.’S “Key to the City”. The key, a symbolic token of welcome to its recipients, has been redesigned to reflect bold new advances in technology.

Renowned sculptor John Dreyfuss (www.johndreyfuss.com) assembled a team of experts to produce his innovative design. Precision CAD/CAM Systems of hunt Valley, MD utilized cutting-edge software to generate a 3D model of the new City Key. Art Research Enterprises, of York, PA, used this model to forge the final results in steel.

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Key to the City

The heavy, uniquely created key was then delivered to Lenox Laser, of Glen Arm, MD for some important finishing touches. Precision, deep laser engraving was required to exhibit sharp, contrasting text to exacting tolerances. Lenox Laser used high power laser marking technology to mark the unique geometric surface of the key.

South African President, Mr. Thabo Mbeki, is reported to be the first visitor formally welcomed with the gift of the city’s new key.

Reading “Justicia Omnibus” on one side and declaring “Opportunity For All” on the reverse, the revised key symbolized the spirit and true heart of America’s great capital city. Lenox Laser is privileged to have taken part in this exciting, historical project.