Enclosure options?

This topic contains 6 replies, has 6 voices, and was last updated by Profile photo of Yuki Yuki 2 months, 3 weeks ago.

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  • #4028

    Profile photo of Kevin
    Kevin

    Participant

    I know that many materials which are transparent to visible light do not pass LWIR.

    Anybody have suggestions for a good option for an enclosure that will hold a Pi along with a FLiR Dev Kit with Lepton module? Perhaps a case or window made from HDPE would work?

    Ultimately I’m looking for a solution to provide a degree of protection against dust and the like, not necessarily weather-tight.

    #4029

    Profile photo of Belsin
    Belsin

    Moderator

    Hi Kevin,

    For ideas on what materials would make a good window for the Lepton, you could check Section 11 from the Lepton Data Brief.

    Here’s a snippet:
    “Common materials for LWIR windows include silicon, germanium, and zinc selenide”

    – Belsin

    #4085

    Profile photo of Kevin
    Kevin

    Participant

    Good info, but I’d suspect that a reasonable size window made out of any of those materials might be outside of a hobbyist budget.

    For now, I’m using a section of the cling-wrap from a gas station egg salad sandwich. Got the idea here.

    #4116

    Profile photo of Cal Loo
    Cal Loo

    Keymaster

    Yep, that’s gonna be a LOT less expensive. I’m interested to hear how that works out for you Kevin, good luck!

    Cal

    #4454

    Profile photo of Cullen
    Cullen

    Participant

    I’ve also discovered that the stiff plastic used to store photo paper is mostly thermally transparent. I did a couple quick tests and even 3-4 sheets bundled together allow most of the IR through.

    #15961

    Profile photo of Thomas
    Thomas

    Participant

    Hello,

    good stuff is the proof windows from a motion detector.
    You can it warm up and press a thin film.

    Not for outdoor, in case of rain, poison can develop:
    You use 2 ZnSe Laser lens with the same focal length, that’s an enlargement of 1.
    Or 2 with different focal length for a telelense.

    regards
    ThomasD

    #18453

    Profile photo of Yuki
    Yuki

    Participant

    Hi,

    Has there been any new developments on more accessible lens to use for the flir lepton dev kit as a transparent protective enclosure?

    2 ZnSe lens sounds like it will take up a lot of space.

    any other recommendations?

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