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Light guides – for assembling on front panels

Light guides for front panels and housing fronts are always the correct solution for developing electronic devices when the light guide cannot or should not be fixed on the circuit board. Pressing the light guide in a fitting front panel borehole, makes it hover over or in front of the SMD LED without touching it. This type of assembly creates many great possibilities for the electronics developer.
Detailed overview of
Front panel light guides
Overall summary
All light guides
Current catalogue: LL14
Catalogue download / order
Overall summary
All catalogues and brochures
For direct contact to your light guide specialist:
4 0211 20002-43 or Ö
A variety of options

MENTOR offers a wide range of very varied front panel light guides. Single light guides and multiple light guides are available. As well as classic diameters, 5.2 or 5.0 mm and 3.2 mm, miniaturised versions with Ø2.2 mm can be purchased. In the normal version or IP68 rated. All versions are available in a wide variety of different lengths.

Different product options offer extensive degrees of freedom to assemble. Light guides for front assembly are standard and deliverable in a great variety of versions. They are available as options with straight or diagonal inject face surface and thus enable horizontal or vertical assembly. The benefits of the versions for assembly from the rear of the front panel are the homogeneous light pattern and the flush-fitting installation.

Since light guides always work outwards from the interface, they influence the design of the devices. Here the light guides with round beam surfaces and spherical, planar or counterbore head offer many aesthetically pleasing options, as does the version with a square head. An excellent light pattern always ensures high-quality visualisation here.
Head types

Inject face

Assembly variants

For front
For rear
Head shapes

Custom light guide solutions

In cases where a customised design represents the best solution, MENTOR offers a great many options. For example, a special length (Size A) can in many cases be implemented simply at no or only minimal tooling cost. Other head shapes and sizes or coloured light guides are also possible. More about custom light guide solutions.
Miniaturised light guides

Our portfolio also includes miniaturised versions in the front panel-mounted light guide range. With a head diameter of 2.2 mm, they are available as standard and as IP68 versions, each with straight or diagonal light inject face. More about miniaturised light guides.

Front panels – Light guides for front assembly
with round head

These light guides enable positions deep on the front panel with SMD SIDELEDs and also vertical options with SMD TOPLEDs or SMD CHIPLEDs to be implemented. Assembly takes place by pressing into the front panel borehole. These light guides can be used with LED-like display form and with a flat display surface and bevel to improve visualisation and with a finish flush to the front panel.

with square head

Square light guides offer designers and device developers new possibilities to design their products in an individual way and to differentiate them from products of competitors. More about square head light guides.

Article selection - here you find:
Front panel light guides...

...for front assembly, square Inject face coupling (0°)
with round head – IP68

The basic light guides of the front panel light guides for front assembly have been further developed to create a splash-resistant version that has been tested in accordance with IP68. The particular benefits consist in being watertight through a special moulding of the plastic which requires a precise assembly borehole C. All forms of the light guide head available in the basic versions – planar, spherical, and with counterbore head – and the two inject face versions – straight (0°) and diagonal (45°) – are also on offer here.

Front panels – Light guides for rear assembly
With round head – single

Light guides for rear assembly are offered with two different heads: Whilst the light guide with a spherical head sticks out a little from the surface of the front panel and thus provides a very wide radiating angle, the version with the planar head enables flush mounting which is often required on aesthetic and functional grounds.

With round head – multiple

The light guides for rear assembly are thus combined to form a multiple light guide by using a flexible chain so that quick and simple assembly becomes possible from inside the front casing. This element enables the tolerances of the distances in the front of the casing to be almost equalised.

World of Light Guide · Overall summary · Article selection

Introduction and General Overview
Customised solutions
References for light guides / opto
Technical Data. LED Recommendations.

Square light guides

General description
For front panel assembly
... All
For circuit board assembly
... Horizontal, All
... Horizontal, 1-row
... Horizontal, 3-row

M-Cut 2D –light guide systems

General description
... Area Light Guide
... Bargraph Light Guide
... Solid Strip Light Guide
... All

Flexible Light Guides

General description
Range overview
... For SMD-LEDs
... For THT LEDs
... Accessories
Miniature Light Guides

General description
Range overview
For front panel assembly
... Standard
... IP68
... All
for PCB-mounting
... Horizontal, Round
... Horizontal, Square
... Horizontal, Rectangular
... Horizontal, All
... Vertical, Round
... Vertical, Square
... Vertical, Rectangular

Front panel Light Guides

General description
Range overview
... Round, Inject face: Straight (0°)
... Round, Inject face: Angular (45°)
... Accessories
... IP68, Round, Inject face: Straight (0°)
... IP68, Round, Inject face: Angular (45°)
... Square head, Inject face: Straight (0°)
... Round, Single, Planar
... Round, Single, Spherical
... Round, Single, All
... Round, Multiple, Planar
... Round, Multiple, Spherical
... Round, Multiple, All
Horizontal Light Guides

General description
Range overview
With round head
... 1-row
... 2-row
... 3-row
... 4-row
With square head
... 1-row
... 3-row
With rectangular head
... 1-row (Bargraph)

Vertical Light Guides

General description
Range overview
With round head
... Single elements
... Multi-column, 1-row
... Multi-column, 2-row
... Multi-column, 3-row
... Multi-column, 4-row
With rectangular head
... Single elements, 1-row
... Multi-column, 1-row, 2 x 5 mm, Grid 5,08
... Multi-column, 1-row, 2 x 5 mm, Grid 2,54
... Multi-column, 1-row, 2 x 3 mm (miniaturised)