ALLVAR University
Learn More About Negative CTE and ALLVAR Alloys
Add negative CTE to your design toolbelt! At ALLVAR, we aim to provide resources to help innovators design and use negative thermal expansion in their projects and applications. ALLVAR University was established as a resource to help teach the fundamentals of designing with negative thermal expansion.
ALLVAR News and Blog – Dig deeper into the regularly updated blogs to learn more about specific ALLVAR Alloys use cases and news.
Video Library – ALLVAR offers a wide range of educational videos on the principals of thermal expansion. Learn how these properties fit into the design of optical and mechanical systems. Want to see negative thermal expansion in use? Check out the demo videos to see ALLVAR Alloys in action.
Papers and Presentations – Here you can find links to publications related to ALLVAR Alloys and externally published presentations.
SOLIDWORKS Material Definition – Want to model ALLVAR Alloy 30 within SOLIDWORKS? We can help. Request the material definition here.
Negative CTE Blog Posts
Learn more about the work being done towards negative CTE alloys and their applications in the ALLVAR blog series.

Carbon Fiber Reinforced Polymers (CFRP) vs ALLVAR: Near Zero Thermal Expansion Materials
Carbon Fiber Bar and Tube vs ALLVAR Alloys Bar and Tube In the realm of advanced materials for precision structures, carbon fiber reinforced polymers like

A Milestone Year for ALLVAR: 2024 YEAR-IN-REVIEW
A Message from James A. Monroe, Founder & CEO 2024 marks ALLVAR’s ten-year anniversary and my goodness have we come a long way. Since

Athermalizing Mounted Doublets with ALLVAR Alloys: Unlocking New Possibilities in Athermal Optics
Increasing your options on the athermal glass map. As a ray tracer, what potential athermal designs could you unlock if optical your glass choices were

Tips for Designing with ALLVAR Alloys: Simplified Thermal Design
Want to learn more about how ALLVAR alloys can help with your thermal design? Find these tips, tricks, and rules of thumb to start designing

Looking back and launching forward: 2023 YEAR-IN-REVIEW
A Message from James A. Monroe, Founder & CEO To Everyone Rooting For ALLVAR, The ALLVAR team has been working hard in 2023 and is ready

Unlocking the Cosmos: ALLVAR’s Role in the Nancy Grace Roman Space Telescope
ALLVAR is headed to space in a big way! Find out how ALLVAR Alloys are being used aboard the Nancy Grace Roman Space Telescope to

Thermal compensation washers now available with COTS item numbers!
New commercially-off-the-shelf ALLVAR thermal compensation washer have arrived! Learn more here.

Thermal Compensating Washers for CTE Mismatch
Learn how to use negative thermal expansion ALLVAR washers or spacers to maintain a constant preload and tackle CTE mismatch.

The Evolution of Athermal Design
Athermal design owes its foundations to an 18th century clockmaker’s designs. ALLVAR Alloys will help you revolutionize your design.
Video Library
Learn More About Negative CTE and ALLVAR Alloys
Add negative CTE to your design toolbelt! ALLVAR offers a wide range of educational videos on the principals of thermal expansion. Learn how these properties fit into the design of optical and mechanical systems. Want to see negative thermal expansion in use? Check out the demo videos to see ALLVAR Alloys in action.
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- Allvar University - Learn About CTE
- Demos
- Meet the Team
- NTE Spacers
- Ultra-Stable Struts
- Washers
- Webinar

Athermalizing Optics Part 2: Athermal Doublet Example with ALLVAR Alloy 30

Athermalizing Optics Part 1: Understanding the equations

CTE Part 3 – Average and Instantaneous CTE in Some Real Materials

Optics Part 2 – The Coefficient of Thermal Defocus on Real Materials

Optics Part 1 -The Coefficient of Thermal Defocus

Creating a Zero Thermal Expansion Part 3 -Tailoring Thermal Expansion to Achieve Zero Expansion with ALLVAR Alloys

CTE Part 1 – Average and Instantaneous Calculations

CTE Part 2 – How to Choose Between Average or Instantaneous Calculations

Creating a Tuned Thermal Expansion Part 2 – Tailored Expansion with Multi-Components

Creating a Tailored Thermal Expansion Part 1 – Using ALLVAR Negative Thermal Expansion Alloys to create a target CTE.

Passive Athermalization Solutions for Optical System Alignment

Meet the ALLVAR Team

Jeremy McAllister talks at SPIE AR/VR/MR

Dr. James A. Monroe Talks about SPIE AR/VR/MR

Application: Negative Thermal Expansion Components for Thermal Focus Stability in optics

Visual Comparison of Thermal Focal Shift in Common IR Optic Materials versus ALLVAR

Negative Thermal Expansion Washer Demo

Reducing the length of athermal optics with ALLVAR Alloys

Deriving a Passive Athermalization Figure of Merit for Length Comparison
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