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TCUV SERIES: ULTRA-HIGH IMAGE RESOLUTION, ACCURACY AND FIELD DEPTH

Opto Engineering TCUV Series bi-telecentric lenses are specifically designed to ensure the highest image resolution today available in the machine vision world.
No other lenses in the market can efficiently operate with pixels as small as 2 microns. For this reason TCUV bi-telecentric lenses are a MUST for all those using high resolution cameras and seeking for the highest system accuracy.
Common lenses and traditional telecentric lenses operate in the visible light (VIS) range. The maximum resolution of a lens is given by the cut-off frequency, that is the spatial frequency at which the lens is no longer able to yield sufficient image contrast.
Since the cut-off frequency is inversely proportional to the light wavelength, common optics are useless with very small pixel sizes (such as 1.75 microns) which are becoming increasingly popular among industrial cameras.

TCUV bi-telecentric lenses operate in the 365/425 nm range and deliver much higher image contrast at high spatial frequencies, being therefore compatible with the tiniest pixel sizes.
Moreover, when used in combination with normal cameras, the resolution of these lenses is so high that they can tolerate much larger object displacements (higher field depths) than common lenses before the image gets defocused.

 

Graph of two telecentric lenses operating at working F-number 8The graph shows the limit performances (diffraction limit) of two lenses operating at working F-number 8.

The standard lens operates at 587 nm (green light) while the UV lens operates at 365 nm.

 

Graph that shows the resolution specifications of UV telecentric lensesThe CTF function, which expresses the contrast ratio at a given spatial frequency is much higher with TCUV lenses.

The vertical bars show the cut-off frequencies of each lens: TCUV lenses still yield some contrast up to 340 lp/ mm!

 

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Detector Type Optical Specifications Dimensions
1/4'' 1/3'' 1/2'' 1/1.8'' 2/3''   Datasheet
& Drawing
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Quotation
Part Number magn. w x h w x h w x h w x h w x h W.D. F/N Telecentricity Distortion Field CTF@ Mount Length Diam
(3.6 x 2.7) (4.8 x 3.6) (6.4 x 4.8) (7.13 x 5.37) (8.8 x 6.6) Depth 70 lp/mm
(7) (1) (2) (3) (4) (5) (6)
(X) (mm x mm) (mm x mm) (mm x mm) (mm x mm) (mm x mm) (mm) deg. % (mm) (%) (mm) (mm)
 
Object Field of View (mm x mm)
TCUV1236 0.175 20.5 x 15.4 27.4 x 20.5 36.5 x 27.4 40.6 x 30.6 diam. = 37.6 98.7 8 < 0.1 < 0.08 21.0 > 40 C 142.3 61.0   TCUV1236  
TCUV2336 0.241 14.9 x 11.2 19.9 x 14.9 26.6 x 19.9 29.6 x 22.3 36.5 x 27.4 98.7 8 < 0.1 < 0.08 11.0 > 40 C 160.4 61.0   TCUV2336  
TCUV1248 0.133 27.0 x 20.2 36.0 x 27.0 47.9 x 36.0 53.4 x 40.2 diam. = 49.4 130.7 8 < 0.08 < 0.08 37.0 > 40 C 176.1 75.0   TCUV1248  
TCUV2348 0.183 19.6 x 14.7 26.2 x 19.6 34.9 x 26.2 38.9 x 29.3 48.0 x 36.0 130.7 8 < 0.08 < 0.08 20.0 > 40 C 160.4 75.0   TCUV2348  
TCUV1256 0.114 31.5 x 23.6 42.0 x 31.5 56.1 x 42.0 62.4 x 47.0 diam. = 57.8 154.0 8 < 0.1 < 0.08 51.0 > 40 C 198.4 80.0   TCUV1256  
TCUV2356 0.157 22.9 x 17.2 30.6 x 22.9 40.8 x 30.6 45.4 x 34.2 56.1 x 42.1 154.0 8 < 0.1 < 0.08 27.0 > 40 C 160.4 80.0   TCUV2356  
TCUV1264 0.100 36.0 x 27.0 48.0 x 36.0 64.0 x 48.0 71.3 x 53.7 diam. = 66 176.0 8 < 0.08 < 0.08 66.0 > 40 C 219.7 100.0   TCUV1264  
TCUV2364 0.137 26.2 x 19.7 34.9 x 26.2 46.6 x 34.9 51.9 x 39.1 64.1 x 48.0 176.0 8 < 0.08 < 0.08 35.0 > 40 C 160.4 100.0   TCUV2364  
TCUV1280 0.080 44.8 x 33.6 59.8 x 44.8 79.7 x 59.8 88.8 x 66.9 diam. = 82.2 221.0 8 < 0.08 < 0.08 102.0 > 40 C 264.3 116.0   TCUV1280  
TCUV2380 0.110 32.6 x 24.4 43.5 x 32.6 58.0 x 43.5 64.5 x 48.6 79.7 x 59.8 221.0 8 < 0.08 < 0.08 54.0 > 40 C 160.4 116.0   TCUV2380  

Notes
(1) Working Distance: distance between the front lens and the object. Set this distance within +/- 3% of the nominal value for maximum resolution and minimum distortion.
(2) Working F-number: the real F-number of a lens when used as a macro. Lenses with smaller apertures can be supplied on request.
(3) Maximum slope of chief rays inside the lens: when converted to millirad, it gives the maximum measurement error for any millimeter of object displacement. Typical (average production) values and maximum (guaranteed) values are listed.
(4) Percent deviation of the real image compared to an ideal, undistorted image: typical (average production) values and maximum (guaranteed) values are listed.
(5) At the borders of the field depth the image can be still used for measurement but, to get a very sharp image, only half of the nominal field depth should be considered.
(6) Measured from the front end of the mechanics to the camera flange.
(7) With 1/1.8" (9 mm diagonal) detectors, the FOV of TCUV 12 XX lenses may show some vignetting at the image corners, as these lenses are optimized for 1/2" detectors (8 mm diagonal).

 

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