Applications

  • Copy / Print, Automated Optical
    Inspection, Banknote scanner

SLA

SELFOC® LENS ARRAY

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Advantages

Smaller system size, easy installation, uniform linear image transmission

SELFOC® Lens Array (SLA) typically comprises one or two rows of micro gradient-index lenses (SELFOC® lenses) arranged in an array.The images from adjacent lenses overlap and form a continuous linear 1:1 image, and with this unique feature, it is used as a key component in a broad range of line scanning systems and electrophotographic printing systems.
In addition to the current broad product line-up, we have recently developed a brand-new lens called "SLA-5DG" to meet the rapidly growing demand for the industrial inspection market. With twice the depth of focus (DOF) of the conventional SLA, the new lens array can be used in an even wider range of machine vision applications.

Features

Point

1

Simple and compact optical system

The remarkably short working distance (L0) of SLA, ranging from around 2 to 20mm, allows a significant reduction in the overall size of the system.
In addition, since SLA forms an erect 1:1 image, the lens array does not require any other lenses or mirrors in the system, unlike ordinary lenses. With this feature, SLA produces a very simple and competitively-priced optical system.

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Comparison of scanner structure of reduced optics (left) and CIS (right).

Point

2

Easy
installation

Because of its flat form, SLA does not require any specific lens holders, and compared with ordinary lenses, its installation is extremely simple and easy.

Point

3

Uniform linear image
with little distortion

SLA provides uniform resolution and light intensity over its entire length, whereas ordinary lenses have peripheral distortion.

Point

4

Broad product
line-up

Various types of lens products are available in a range of size and optical performance depending on the applications and requirements.
The maximum width of SLA is up to approximately 1m.

Applications

Copier / MFP / Document Scanner
(CIS: Contact Image Sensor)

Print head for LED printers
(LPH: LED print head)

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The erect 1:1 image transmission by SLA