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PCHI series

Hole inspection optics for 360° inside view in perfect focus

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.

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

Extendend range

PCHI023 now available for high resolution 2/3″ detectors.

360° OPTICS

			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
		(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 10	120 x 190	450 .. 650	5 .. 62	> 40	4.7	28.0	102.0	250	C	Buy now
PCHI012Hole inspection optics for 1/2″ detectors	1/2”	4.8	10 x 10	120 x 190	450 .. 650	5 .. 62	> 40	5.8	28.0	104.0	250	C	Buy now
PCHI023Hole inspection optics for 2/3″ detectors	2/3”	6.6	10 x 10	120 x 190	450 .. 650	5 .. 62	> 30	8.3	28.0	108.5	250	C	Buy now

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.

Technical documents

Data table

XLS

Product user guide

PDF

Application case PCHI - puffin automation

PDF

Press & marketing content

Smart vision and optical solutions for the food and beverage industry

PDF

Caps inspection and measurement

PDF

Inspection, measurement and illumination solutions for the automotive industry

PDF

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LTLAB2-R

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LTLAB2-W

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LTDV series

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

Unwrapped image

PCHI: Field of view selection chart
Hole diameter	Cavity height	r	Cavity height	r	Working distance
(mm)	(mm)	(%)	(mm)	(%)	(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