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

PCHI family serie for hole and cavity inspection

			Field of view (diam x height) 1		Optical specifications				Mechanical specifications
Part number	Detector size	Image circle Ø	Min	Max	Wavelength range	Working distance	CTF @ 50 lp/mm	wF/# 2	Diameter	Length	Weight	Mount	Focusing
		(mm)	(mm x mm)	(mm x mm)	(nm)	(mm)	(%)		(mm)	(mm)	(g)
PCHI013Hole inspection optics for 1/3″ detectors	1/3”	3.6	10 x 6	120 x 190	450 .. 650	5 .. 62	> 40	4.7	40	102.0	250	C	Manual (lockring)	Quote
PCHI012Hole inspection optics for 1/2″ detectors	1/2”	4.8	10 x 6	120 x 190	450 .. 650	5 .. 62	> 40	5.8	40	104.0	250	C	Manual (lockring)	Quote
PCHI023Hole inspection optics for 2/3″ detectors	2/3”	6.6	10 x 6	120 x 190	450 .. 650	5 .. 62	> 30	8.3	40	108.5	250	C	Manual (lockring)	Quote
PCHI023-MFHole inspection optics for 2/3" detectors, manual focus (focusing gear)	2/3"	6.6	10 x 6	120 x 190	450 .. 650	5 .. 62	> 30	8.3	37.7	108.5	220	C	Manual (focusing gear)	Quote
PCHI023-AFHole inspection optics for 2/3" detectors, adaptive lens focusing	2/3”	6.6	10 x 6	120 x 190	450 .. 650	5 .. 62	> 30	8.3	40 x 65	115.2	270	C	Liquid lens	Quote

Last update: 2021-06-22

Notes

Cameras with CS- to C-mount adapters, filters or protective windows in front of the sensor or other mechanical constraints in the C-mount can limit the focus range of PCHI0xx lenses. Contact us to check compatibility with your specific camera.
Working F-number (wF/#): the real F-number of a lens when used as a macro.

PCHI023 + compatible LTRN075x45 ringlight.

Technical documents

Data table (Last update: :2021-06-22)

XLS

Product user guide

Application case PCHI - puffin automation

Manual PCHI023-AF v2.0

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

Compatible products

High resolution line scan camera COE8KLSMCL-G Mount-M72

COE HR LS series

8k/16k line scan cameras

COE HR AS series

50 - 71 MP area scan cameras

mvBlueFOX3-2 series

USB3 cameras with Smart Features

mvBlueCOUGAR series

GigE / Dual GigE cameras with Smart Features

LTRN075B45

Ring LED illuminator, inner diameter 28 mm, oblique type, blue 470 nm

LTRN075G45

Ring LED illuminator, inner diameter 28 mm, oblique type, green 525 nm

LTRN075R45

Ring LED illuminator, inner diameter 28 mm, oblique type, red 630 nm

LTRN075W45

Ring LED illuminator, inner diameter 28 mm, oblique type, white

LTRNHP075W45

High power LED ring illuminators, oblique type, inner diam. 28mm, white, 6200 k

LTRNHP075B45

High power LED ring illuminators, oblique type, inner diam. 28mm, blue, 475 nm

LTRNHP075G45

High power LED ring illuminators, oblique type, inner diam. 28mm, green, 525 nm

LTRNHP075R45

High power LED ring illuminators, oblique type, inner diam. 28mm, red, 625 nm

LTLAB2-G

Diffusive strobed low angle ring light illuminator - medium size high power green

LTLAB2-R

Diffusive strobed low angle ring light illuminator - medium size high power red

LTLAB2-W

Diffusive strobed low angle ring light illuminator - medium size high power white

LTDV series

LED lighting strobe controllers

Tools and resources

360° optics tutorial

Image gallery

Video gallery

Frequently asked questions

Glossary

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(%) = \frac{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.

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.

Field of view selection chart
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.

PCHI with liquid lens for fast refocusing

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

Application examples

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.

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

Company & Resources

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