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Project 5 FLIR One with alternative lenses



This page looks at further lenses from Argus cameras on the FLIROne unit. The PCB design was made with some additional mountings to take various lenses from both later cameras and the early P4430 type

All the lenses used in Argus Cameras

The table below lists all the lenses that might be found in Argus cameras, and the resulting horizontal fields of view on the FLIR One (120 px at 12um)


Focal Length Aperture

Camera Source

 Mounting

Designed for pixel pitch of
µm

HFOV on
FLIROne
1.2 f/1.8 (?)

F1G2 as built

 F1G2 as built 12 44
4.3 f/1 Argus4 160 (P7050) 20mm thread 25 19
6.3 f/1 Argus4 (P7030) 20mm thread 35 14
6.3 f/1 MiTIC series (post 2018) 18mm thread 17 14
8.6 f/1 Argus4 320 (P7150)
MiTIC 320 (pre 2018)		 20mm thread 25 10
15 f/1> Argus2 or Argus3
(Raytheon BST sensor)		 Pillars 50 5.5
18 f/0.7 P4428
Argus1		 Screws / pillars 100 (Pevicon tube) 5
19 f/1.3 Argus4 320 (P7225) 20mm thread 25 4.3
25 f/0.8 P4430 Wreathall thread 100 (Pevicon tube) 3.6
35 f/1 Argus P type - Lens D Argus P type bayonet 25 2.4
46 f/1 Argus P type - Lens E Argus P type bayonet 15 1.8
50 f/0.8 P4430 Wreathall thread 100 (Pevicon tube) 1.8
65 f/1.3 Argus P type - Lens F Argus P type bayonet 25 1.3
75 f/0.8 P4430 P4430 thread 100 (Pevicon tube) 1.1
150 f/1 Pevicon camera tests P4430 thread 100 (Pevicon tube) 0.6

Build

PCB assembly showing P4430 camera type lens mounting in place. The larger thread os the 'P4430' square double start type, the inner thread the 'Wreathall' mount.
Camera unit with 75mm lens attached.
Camera unit on tripod with 35mm lens attached.

Images with other lenses



Visual
Original lens - but focussed
6mm
14° horizontal
   
8.6mm
10° horizontal
25mm
3.6° horizontal
35mm
2.4° horizontal
    
75mm
1.1° horizontal
Images of the moon
65mm, 0.6° HFoV75mm, 1.1° HFoV150mm, 0.6° HFoV


Final Thoughts

Depending on the planned use, lenses much over 20mm focal length become very difficult to aim due to the narrow field of view. However the very long focal lengths of 'old' lenses on the small pitch sensor of the FLIR One can give surprising reslts, as seen by the moon image. A similar approach to better cores where the image can be reprocessed may be even better. I think a 150mm on a 17u ULIS sensor sytem such as Argus MITIC could be interesting.

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Fire-TICs Project 4 page2 14 August 2022  Images © M.W.Wilson  All tradename © respective owners