PCHI series
Hole inspection lenses for 360° inside view in perfect focus
As of January 1, 2025, PCHI series will be discontinued and replaced by the new PCHIL series. For further details, please refer to the Product Discontinuation Notice.
PCHIL series is temporarily not available in China and Taiwan. Please contact your area manager for more information.
Key advantages
- Perfect focusing of holed objects
Both the walls and the bottom of a cavity are imaged in high resolution - Cavity inspection from the outside
No need to put an optical probe into the hole - Very high depth of field
Objects featuring different shapes and dimensions can be imaged by the same lens - Wide angle of view
Sample surfaces are acquired by the lens under a convenient perspective to clearly display their features - New focusing ring version available
Manually adjusting the focus is never been easier! New integration with Optotune liquid lens technology
PCHI AF allows for an extremely fast and repeatable change in focus
Real-world application examples and case histories
Notes
- Working distance: distance between the front end of the mechanics and the object.
- Working f-number (wf/N): the real f-number of a lens in operating conditions.
- Measured from the front end of the mechanics to the camera flange.
Working principle
PCHI optics can image cavities whose diameters and thicknesses span over a wide range of values.
For a given hole diameter, the table below lists the maximum cavity height allowed for both high-resolution imaging (small pixel sizes) and normal resolution imaging (> 5 micron pixels) applications; the "r" ratio indicates how much of the detector area gets covered by the image of the hole inner walls.
The listed working distance values ensure that the object image is exactly inscribed into the short side of the detector, thus maximizing "r" ratio and image resolution.
Field of view selection chart
| PCHI013, PCHI012 and PCHI023 field of view | |||||
| Hole diameter (mm) | Cavity height (mm) | r (%) | Cavity height (mm) | r (%) | Working distance (mm) |
| 10 | 6 | 23.5 | 10 | 28 | 5 |
| 15 | 8.5 | 22.5 | 14.5 | 29 | 6.5 |
| 20 | 13 | 26.5 | 22 | 32.5 | 9 |
| 25 | 18 | 26 | 31 | 33 | 11 |
| 30 | 22 | 26 | 37 | 32 | 14 |
| 40 | 31 | 26.5 | 53 | 32 | 18 |
| 50 | 40 | 27 | 68 | 32 | 23 |
| 60 | 50 | 28.5 | 85 | 32.5 | 29 |
| 70 | 60 | 28 | 102 | 33 | 35 |
| 80 | 75 | 29.5 | 120 | 34 | 41 |
| 100 | 97 | 30 | 155 | 34.5 | 52 |
| 120 | 120 | 31 | 190 | 35 | 62 |
Fixed focal length lenses vs PCHI Series
Examples of images taken with PCHI
Nut
Sprocket
Heatsink
Large-sized preform
Small preform
Bottle cap
