Enclosure for mini Z probe

thingiverse

This enclosure safeguards David Crocker's mini IR height sensor board against filament damage. When utilizing an untreated or clear anodized aluminum board with the sensor, a polarizing filter can be integrated in front of both the sensor and LEDs. A budget-friendly film polarizer from eBay was used, which was then trimmed to size. This polarizer operates within the near-infrared spectrum and transmits approximately 25% of light. The light passes through the polarizer twice – once on its journey from the LED to the print bed and again after reflecting off the print bed en route to the sensor. Although aluminum reflection slightly alters polarization, this proves beneficial when ambient NIR affects the sensor in certain environments. When cut at a precise angle, the polarizer can effectively eliminate unwanted sunlight influences. Film polarizers are readily available on eBay at an affordable price. Depending on the material, two films stacked at an optimal angle can be used to tailor light attenuation as desired.