Optomechanics – Using CodeV Prescription in Ivory and Jade to Find Structural and Thermal Weaknesses

Colleagues:

I’ve been known to lecture my students and colleagues on the need to keep their tools sharp.  Some time ago AEH was invited to a design review as an observer and since I had no direct participation I sat at the back of the room, behind John, the systems engineer who was controlling the projector.  The technical sessions went well but about half-way through the schedule and budget sessions he suddenly blackened the screen and turned on the overhead lights.  He slowly turned and surveyed those of us sitting behind him.  His gaze settled on me!  “What, John?” I asked.  He stared at my hands which were holding my pen knife and its sharpening steel.  “Just keeping my tools sharp,” I declared sheepishly.

One of AEH’s sharpest tools, other than a pen knife, is Ivory’s Optomechanical Modeling Tools.  It’s been under continuous development incorporating many of my personal insights working as a mechanical engineer in the optics industry.  I recently put together an updated version and released it to all users of Version 3.  That’s another way I keep AEH’s tools sharp (and protect AEH’s Ivory subscribers, too).  Ivory is AEH’s prime tool for engineering thermally and structurally reliable optical systems.  It’s designed to work in both Excel and Nastran and its application early in the design process prevents much embarrassment and saves many labor-hours from preventable failures that may occur later in qualification tests and service.

Somewhat more recently AEH was invited to participate in a “Tiger-Team” review of a sub-contractor.  The initial issue was broken glass.  The first thing I did was get a copy of the physical optical prescription (CodeV) and read it into Ivory (for the structure) and Jade (for the broken glass).  I could then quantitatively infer where the principal structural and thermal weaknesses might be.  With that insight I was able to form an independent assessment of the completeness of the design team’s engineering effort, which undergirded my report to the prime contractor.

I hope to see all of you at SPIE’s Optics+Photonics in San Diego come August.  I’ll be teaching (Optomechanical Analysis), chairing (The Optomechanical Engineering Technical Group and Optomechanics 2017), presenting and publishing (on a new diffraction grating capability in Ivory) and begin planning our next SPIE Conference (Optomechanics 2019). 

That also keeps AEH’s tools sharp. 

Hasta luego, caiman.

Al H.
6-5-17

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