ISO 9001 - AS 9100 - ITAR Standard & Custom Optical Filters and Coatings

 

Angle Shift in Bandpass Filters
Angle Shift in Bandpass Filters

Published by Rob Pursel on June 3rd, 2022

All Optical Interference Bandpass Filters exhibit some degree of shift with the angle of incidence (AOI). Since the layers of a bandpass filter operate in the coherence range of the desired wavelengths, a departure of AOI from zero degrees results in the shortening of the center wavelength. To achieve the desired bandwidth , standard bandpass filters are designed with the minimum layer thicknesses needed in the absentee spacer layers. An example is given below (Fig. 1) of a standard bandpass filter centered at 750 nm with a bandwidth of 20 nm. One can see that the filter will still transmit the center wavelength (CWL) to a tilt of 15° AOI. This limits the function of the filter to about f/1.9 or a 30° full cone angle.

Optical Filters, Best Optical Filter, Optical Filter Manufacturers, Optical Filter Designers, Optical Coatings, Hyperspectral Imaging, Veterinary Optics, Pulse Oximeter, 3D Printing, Optical Prototyping, Prototyping, Angle Shift, Bandpass Filter

Detecting Counterfeits with Optical Filters
Detecting Counterfeits with Optical Filters

Published by Isabella Mikols on May 5th, 2022

For centuries, forgery has been a problem that numerous industries encounter, some more than others, and the problem still exists today. Over time, optics have been improved upon and utilized to detect counterfeit items, helping to remove them from circulation. In this blog, we’ll discuss how optics are used in the detection and prevention of counterfeits in currency and artwork.

Optical Filters, Best Optical Filter, Optical Filter Manufacturers, Optical Filter Designers, Optical Coatings, Laminated Filters, IR Filters, counterfeit detection

3D Printing Enables Fabrication Agility
3D Printing Enables Fabrication Agility

Published by Nick Sullivan on March 22nd, 2022

In recent years, 3D printing has exploded in popularity with both businesses and hobbyists alike, due to rapid improvements in the technology and the ever-increasing affordability of owning and operating a system.  While 3D printing cannot yet replace traditional manufacturing for most production parts, it has become an extremely effective tool for conceptualization, prototyping, custom tooling, and display modeling for presentations and trade shows.

Optical Filters, Best Optical Filter, Optical Filter Manufacturers, Optical Filter Designers, Optical Coatings, Hyperspectral Imaging, Veterinary Optics, Pulse Oximeter, 3D Printing, Optical Prototyping, Prototyping

Optical Filters in Veterinary Medicine
Optical Filters in Veterinary Medicine

Published by Dixie Richards on February 11th, 2022

The connection that humans have with their pets is quite similar to the affection people feel towards their children. For many, house pets are core members of our families. That being said, routine veterinary care for pets is becoming just as common as routine doctor appointments for any traditional family member. 

Optical Filters, Best Optical Filter, Optical Filter Manufacturers, Optical Filter Designers, Optical Coatings, Hyperspectral Imaging, Veterinary Optics, Pulse Oximeter

Smart Farming Relies on Custom Optical Systems
Smart Farming Relies on Custom Optical Systems

Published by Isabella Mikols on January 17th, 2022

In Andover’s continuing series of blogs on our served markets, we look at how optics technology is impacting agriculture. 

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Parallel Design Approach Shortens Concept-to-Product for SmallSats
Parallel Design Approach Shortens Concept-to-Product for SmallSats

Published by Joshua Jones on December 1st, 2021

Parallel Design Approach Shortens Concept-to-Product Timeline for Small Satellites

Best Optical Filter, Optical Filter Manufacturers, Optical Coatings, Laminated Filters, NHEmployment, Small Satellites

There’s a Lot to Like About Working in New Hampshire
There’s a Lot to Like About Working in New Hampshire

Published by Dixie Richards on November 17th, 2021

Andover Corporation is now located in Salem, New Hampshire, but we haven’t always been here. The company relocated in 1982 and the decision was more than just a financial one. It was also a lifestyle and wellness opportunity. Our 40 employees enjoy the best of both worlds, with the “great outdoors” at their fingertips and the attractions of big city life both within an hour’s drive.  

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Optics in Forensics - Getting an Edge on the Bad Guy
Optics in Forensics - Getting an Edge on the Bad Guy

Published by Dixie Richards on November 3rd, 2021

Forensic science has played a key role in criminal cases for thousands of years. Throughout its evolution, forensics has captivated attorneys, authors and audiences alike. From Sherlock Holmes and Hercule Poirot to CSI and NCIS we have marveled at what forensics can show us. But where is it heading? And how much of what we are see on television is true? One thing is certain, from Holme’s magnifying glass to CSI’s digital microscopes, optics are critical to proving guilt or innocence. Optical systems used in forensics have reached a level of sophistication that can detect even the smallest traces of evidence. One thing is for certain, forensic analysis involving optical systems has proven critical in getting an edge on the bad guy. This paper will discuss the advances made in forensic optics and attempt to separate fact from fiction on the small screen.

Optical Filter Manufacturers, Optical Filter Designers, Optical Coatings, Laminated Filters, IR Filters, ND Filters, Optical Forensics, alternate light photography, profilometry, laser ablation

Lead Time Challenges in the Optical Coating Industry
Lead Time Challenges in the Optical Coating Industry

Published by David Litwinovich on October 6th, 2021

Lead times for custom optical filters have been a challenge long before the COVID-19 pandemic complicated business operations. Although many optical catalogs offer standard parts, lead times can go from a few days, weeks, or possibly months if your specifications deviate even slightly from a standard offering. This delay can occur when the mechanical configuration of your optic is complex or when your spectral specifications include the Ultraviolet (UV) and/or Infrared (IR) regions.

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A Day In The Life Of An Optical Filter
A Day In The Life Of An Optical Filter

Published by Isabella Mikols on September 22nd, 2021

Here I am! A 550FS10-12.5 premium high quality optical bandpass filter, built and designed by Andover Corporation, ready to take on the world! I will be used across the globe in machine vision, helping others by identifying spoiled fruits & vegetables and only letting edible produce make it to the grocers’ shelves. But how did I get here?

Optical Filters, Best Optical Filter, Optical Filter Manufacturers, Optical Filter Designers, Optical Coatings, Laminated Filters, IR Filters, ND Filters