Borehole Lens
Hole inspecting lens enables converge viewing of objects and they are able to inspect both the bottom of the hole and its vertical walls unlike conventional lenses. Hence, they are the preferred solution to probe different object shapes such as cones, holes and cylinders. Furthermore, they are used so that multiple camera and imaging lens setups in identification applications or machine vision inspections aren’t needed.
| Part Number | BHL-6.35 |
| Focal Length | 6.35 mm |
| Back Focus | 10.5 mm |
| Working Wavelength | 480 nm ~ 650 nm |
| Position of Entrance Pupil | Adjustable, 0.9 mm to 2.6 mm |
| F-Number (Iris) | 4≤K≤11 |
| Image Sensor Format | 1/3″ |
| Field Angle | 26° to 36.9°, depending on hole size |
| Ratio of Diameter to Depth | ≥1:3 |
| Smallest hole diameter to be inspected | 3 mm |
| Biggest hole diameter to be inspected | 40 mm |
| MTF on Image Surface | 1) For hole diameter >6mm, 70% contrast at 30lp/mm with F#=5; 2) For hole diameter ≤5mm & ≥3mm, 60% contrast at 30lp/mm with F#=8; |
| Mechanical Mounting Dimensions | |
| Total Length | 109.5 ± 2.00mm |
| Maximum Diameter | 31 mm |
Borehole Lens Information
| Hole Diameter (mm) | Work Distance (mm) | F# | R |
| 3 | 37 | ≥8 | 0.12 |
| 5 | 40 | ≥6 | 0.15 |
| 10 | 43 | ≥5 | 0.22 |
| 20 | 58 | ≥5 | 0.25 |
| 40 | 90 | ≥4 | 0.27 |
Work distance vs. hole diameter for MTF >70% at 30lp/mm with DDR=3 and above
Borehole Lens Knowledge Hub
Image processing capability integrated together, with optical/mechanical/electronics capabilities, can deliver system-level solutions for the manufacturing industry.
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