@Stephanie Lu

Recommendation

New: maybe the Sensors Unlimited one? Seems like there are a few articles saying they’re good for military stuff, things that need steady performance + reliable ops + large throughput (but it’s a 50 mm focal length lens)

When I search for SWIR lenses for satellites, Resolve Optics seems to come up quite a bit in search results (although its website doesn’t explicitly mention space applications and the largest focal length I found was 25 mm)

1. StingRay 100mm SWIR Manual Focus and Iris
   1. Pros: 100 mm SWIR lens, 21 mm image diameter (close to 20 mm requirement?), C-mount interface, 480-1700 nm wavelength range (don’t know if this is a pro though)
   2. Cons: Doesn’t have a lot of information about it on the website, don’t know what the length is but it might be < 50 mm from the image but I might be overly optimistic… Kind of expensive ($8125)
2. Hyperion Optics OTS SWIR Lenses
   1. Pros: EFL 100 mm, length 126.58 mm (which is honestly one of the smaller lengths I’ve found), 900-1700 nm spectral range, might have a C-mount if we choose the HYPSW10020640 option
   2. Cons: Not much information about the OTS options on the website
3. FireAnt SWIR Lens Assemblies
   1. Can go up to 400 mm EFL, 900-1700 nm wavelength range, 16.4 mm image diagonal, overall seems to fit a lot of requirements, BUT from the picture, it looks like it might be longer than 100 mm?
   2. Zoom focal length range, have to request the price

General thoughts:

• Lenses with > 100 mm focal length seem to be more popular among adjustable/switchable range focal length lenses
• Some of these lenses are very expensive (there’s a $30 000+ one in this notion page but I didn’t put it in the database because it has a 200 mm EFL and I wasn’t sure if we wanted that?)
• Most (or maybe all?) of the lenses I’ve found so far have either very long lengths (100+ mm) or the website doesn’t explicitly tell us what the length is
  • I’ve found a lot more lenses with < 50 mm EFL than with > 100 mm EFL and usually the < 50 mm ones have more comprehensive information on their product information pages

EFL → > 100 mm

Length → < 50 mm - haven’t really found anything like this so far OTS

For my reference: https://www.mdpi.com/2072-4292/14/4/900/htm#

Plano-convex lenses

• https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=112
  • Uncoated
  • 350 - 2000 nm
• https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=3281
  • AR coating
  • 1050 - 1700 nm

Beck Optronic