Here we present the CAD models for FINCH EYE Build II (current as of May 2024). Specifically, we have a mechanical model in Fusion (@Arthur Zhou), an optical model in ZEMAX, which include the close-to-final components in the hyperspectral imager. By close-to-final, it is meant that the dimensions might change slightly, but the conceptual design itself is solidified.
A mechanical model of the payload was made in Fusion360. The illustration below (not to scale) updates the volume allocation from FINCH EYE Build I.
Components used for the model:
| Component | Vendor & part Number | Description | Drawings (Link) | Link to ‣ |
|---|---|---|---|---|
| Collimator and Focuser lens | Edmund Optics EO 16-291 | 12.5mm Dia., 0.63 NA, 900-1700nm Coated, NIR Aspheric Lens | (Link ) | |
| 16291.PDF | ‣ | |||
| Slit | THORLABS S50LK | - Ø1" Mounted Slit, 50 ± 3 µm Wide, 10 mm Long | Link | |
| Fore-Optic | Navitar SWIR-50 | 50 mm F/1.4 1" SWIR format megapixel, locking screws | Link | |
| GRISM (custom) | Wasatch Photonics, GR-L5012 | 400lp/mm at 1300nm, clear aperture 12.5mm. | GR-L5012 | ‣ |
| Camera | FLIR Tau SWIR | 60Hz, 640x512 pixels (15um pitch) CMOS, 14-bit resolution, 0.9-1.7um | Exploded View | |
| Drawing | ||||
| STEP File | ||||
| ‣ | ||||
| See “Product Specification, Section 3.2.1 Mechanical Interface” |
Assembly: (By Arthur Zhou, June 3, 2024)
FusionTeam: https://a360.co/3x4B0Bh
Optical model in progress!!
FINCH Eye Build II V(-1)
The optical CAD above is a work in progress. It consists of an arbitrary collimator (to simulate parallel beams coming from the Earth to FINCH) and the FINCH Eye Build II V(-1) component selection: