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  • PCHI series

PCHI series

Hole inspection lenses for 360° inside view in perfect focus

Opto Engineering® CATALOG

Extended range New PCHI models now available with improved manual focusing and liquid-lens based autofocusing
Overview
Models
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PCHI optics have been developed by Opto Engineering® to easily inspect holes, cavities and containers. Unlike common optics or so called “pinhole lenses” which can only image flat fields of view, hole inspection optics are specifically designed to image both the bottom of a hole and its vertical walls.

Thanks to the large view angle (>82°) and innovative optical design, these lenses are compatible with a wide range of object diameters and thicknesses. Hole inspection optics are the perfect solution to inspect a variety of different object shapes such as cylinders, cones, holes, bottles or threaded objects.

New and improved models are now available, providing the ease-of-use of an upgraded focusing mechanism (PCHI MF) and the flexibility of an immediate focusing thanks to the integration of liquid lens technology into the lens’ optical design (PCHI AF).

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 field depth
    Objects featuring different shapes and dimensions can be imaged by the same lens
  • Wide viewing angle
    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 liquid lens technology
    PCHI AF allows for an extremely fast and repeatable change in focus

Extendend range

PCHI012-MF and PCHI012-AF now available on request.

360° OPTICS
FL mm
PCHI family serie for hole and cavity inspection

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.

r(%)= Side view height (px) Detector short side (px) * 100

Working principle

PCHI series features 82° view angle and can image both the inner walls and the bottom of cavities.
PCHI series features 82° view angle and can image both the inner walls and the bottom of cavities.
Defective threaded nut imaged with PCHI lens. Damaged threads can be easily detected.
Defective threaded nut imaged with PCHI lens. Damaged threads can be easily detected.
Unwrapped image. 360LIB-01 dedicated software library is available to easily and accurately unwrap the images.
Unwrapped image. 360LIB-01 dedicated software library is available to easily and accurately unwrap the images.

Field of view selection chart

PCHI 013, PCHI 012 and PCHI 023 field of view

 High res. imaging       Normal res. imaging
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

The inner walls of cavities are in perfect focus thanks to PCHI unique optical design.
The inner walls of cavities are in perfect focus thanks to PCHI unique optical design.

PCHI with liquid lens for fast refocusing

PCHI023-AF with integrated liquid lens allows to quickly and remotely change the focus.
PCHI023-AF with integrated liquid lens allows to quickly and remotely change the focus.

Application cases

PCHI023-AF can be mounted onto a robotic arm and quickly refocused to inspect various cavities diameters in complex mechanical parts.
PCHI023-AF can be mounted onto a robotic arm and quickly refocused to inspect various cavities diameters in complex mechanical parts.
PCHI023-AF can be used to inspect in rapid sequence the neck and bottom/sides of a bottle. A working distance change might be necessary to achieve best results.
PCHI023-AF can be used to inspect in rapid sequence the neck and bottom/sides of a bottle. A working distance change might be necessary to achieve best results.
Main optical specifications Field of view (diameter x height) Advanced optical specifications Mechanical specifications
Part
number
Image
circle
diameter
Max
sensor
size
Minimum Maximum Working
distance
with
minimum
object
Working
distance
with
maximum
object
Working
ƒ/N
Focusing Mount Length Outer
diameter
(mm) (mm × mm) (mm × mm) (mm) (mm) (mm) (mm)
1 1 2 3
PCHI013 3.6 1/3” 10.0 x 6.0 120.0 x 190.0 5 62 5 Manual (lockring) C 101.9 40 Quote
PCHI012 4.8 1/2” 10.0 x 6.0 120.0 x 190.0 5 62 6 Manual (lockring) C 103.8 40 Quote
PCHI023 6.6 2/3” 10.0 x 6.0 120.0 x 190.0 5 62 8 Manual (lockring) C 108.5 40 Quote
PCHI023-MF 6.6 2/3" 10.0 x 6.0 120.0 x 190.0 5 62 8 Manual (gear) C 113.7 37.7 Quote
PCHI023-AF 6.6 2/3” 10.0 x 6.0 120.0 x 190.0 5 62 8 Liquid lens C 115.2 40 Quote
Last update 07 Apr 2022

Notes

  1. Working distance: distance between the front end of the mechanics and the object.
  2. Working f-number (wf/N): the real f-number of a lens in operating conditions.
  3. Measured from the front end of the mechanics to the camera flange.

Technical documents

Product user guide
pdf
Back focal adjustment
pdf
PCHI023-AF Manual
pdf

Press & marketing content

Smart vision and optical solutions for the food and beverage industry
pdf
Advantages of 360° view lenses vs multi-camera systems
pdf
OE products for Pharma & Medical Industries
pdf
Caps inspection and measurement
pdf
Inspection, measurement and illumination solutions for the automotive industry
pdf
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Discover our high-performance machine vision software

Software library & stand-alone tools for the optimization of 360° optics setups

360LIB Suite

Software library and stand-alone tools for the optimization of 360° optics setups

Some accessories you might be interested in

Cables

CB series

Cables
Controllers for liquid lens modules

ELDV series

Controllers for liquid lens modules

For cavity imaging and measurement from inside, see our

Boroscopic probe for cavity measurement and inspection

PCBP series

Boroscopic probes for panoramic cavity imaging and measurement from inside

Video gallery

Find more videos on our Vimeo channel

Product images

Examples of images taken with PCHI

Nut

Sprocket

Heatsink

Large-sized preform

Small preform

Bottle cap

Tools and resources

360° optics tutorial
Image gallery
Video gallery
Frequently asked questions
Glossary

See also

PC series
PCCD series
PCBP series
PCPW series
PCMP series
TCCAGE series

Press & marketing content

Smart vision and optical solutions for the food and beverage industry
pdf
Advantages of 360° view lenses vs multi-camera systems
pdf
OE products for Pharma & Medical Industries
pdf
Caps inspection and measurement
pdf
Inspection, measurement and illumination solutions for the automotive industry
pdf
Company & Resources
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