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Linear Lens Arrays

In addition to conventional lenses we also supply gradient index lens arrays (Selfoc Lens Array, SLA).

Gradient index lenses are not based on ground glass surfaces, but achieve the necessary bending of the light by variation of the refractive index within the lens.

Used in an array each lens makes an upright and real 1:1 image with an image circle bigger than the lens diameter. The single lenses are aligned in single or double rows in a compact array, so that the images by the single lenses overlap. The height of the resulting image is determined by the type of SLA used, the width depends on the length of the lens and can be up to several meters.


SLAs are optimised for well defined working distances and wave lengths that can be seen in the table below.

Amongst others SLAs are used in Fax machines and scanners, but also to control industrial roll goods. They are also part of CIS modules and respective cameras.

SLA Type TC
[mm]
Z0
[mm]
L0
[mm]
Wavelength
[nm]
MTF at 6LP/mm [%]
Average
Aperture
(Line Scan)
Lens Rows
9AG 54,0 19,85 ± 1,3 17,08 510/(570) 53 2
48,0 20,40 ± 1,3 13,80 510/(570) 55 2,86 2
12EG 9,9 4,3 ± 0,1 2,80 530 3,15 1
9,9 4,3 ± 0,1 2,80 530 2,29 2
12DG 18,2 8,60 ± 0,20 4,80 570 70 2,69 1
18,2 8,60 ± 0,20 4,80 570 70 1,97 2
20BG 13,8 6,88 ± 0,4 3,46 570 55 0,93 2
14,4 6,78 ± 0,33 3,81 570 55 1,32 1
15,1 6,92 ± 0,4 4,09 740 55 1,01 2
20DG 9,3 4,395 ± 0,07 2,45 740 60 1,04 2
9,1 4,45 ± 0,20 2,33 740 60 1,02 2

Further technical details are sent on request.

Sample quantities in A4 or A3 length are usually available from stock. Even customer-specific blanks are often possible even in small quantities.


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Last update: 2019-15-04