Collimators
If you know the specific type of collimator you would like more information on, click on one of the buttons just below in the header. If you would like general information about the different types of collimators available, then scroll down this page for the topic sections about collimators.
VISUAL OPTICAL INSTRUMENTS
Collimators
Vermont Photonics offers the complete line of Möller-Wedel Optical GmbH collimators with fixed focus setting and collimators with adjustable focus setting that also are available with either a reticle turret or double micrometer.
Click a section button below to learn more.
COLLIMATORS
Selection Criteria
The highly customizable collimators of MÖLLER-WEDEL OPTICAL GmbH allows you the perfect choice for your application.
To guide you with your choice, this short section describes the influences of focal length, objective aperture and other characteristics of fixed or adjustable focus setting on the collimator.
SELECTION CRITERIA
Long or Short Focal Length?
A longer focal length leads to small field angles. As the focal length increases the field of view (FOV) decreases proportionally. For resolution testing choose a collimator with equal or slightly larger focal length than the optics under test. When used in conjunction with a testing telescope choose the same focal length. Additionally, the intensity of the light bundle emitted from the collimator decreases with increased focal length. A longer focal length affects the mechanical extension of the tube, as well.
SELECTION CRITERIA
Small or Large Objective Aperture?
Light conditions are more favorable when large apertures are used, and the evaluation of the results is easier and more accurate. A long distance between test specimen and collimator demands a relatively large free aperture (or aperture ratio). For these kinds of measurements a relatively large aperture diameter should be used.
SELECTION CRITERIA
Fixed or Variable Distance Setting?
Fixed, infinity focus collimators are generally the best choice when testing systems adjusted to infinity. Fixed focus tubes set at other than infinity can be ordered. Also a special alignment to a customized wavelength is possible. (Standard wavelength: 546 nm (Green))
Measuring tasks requiring different wavelengths of light or measurements requiring focus other than infinity are best accomplished using focusable collimators.
COLLIMATORS
Collimators with FIXED FOCUS Setting
A collimator projects a reticle to a certain distance. Usually the image is at infinity at a wavelength of 546 nm (Green). But also alignments to 470 nm (Blue) or 660 nm (Red) are possible.
The main components of a collimator are:
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objective tube with objective
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reticle sleeve with reticle, condensor and illumination
For more information on any of our three categories of FIXED FOCUS collimators, click on one of the images below.
The simplest version of a collimator is a collimator with fixed focus setting and one collimator reticle. We offer collimators with different focal lengths and diameters.
A collimator with a reticle turret provides 6 selectable collimator reticles. The reticle turret allows a quick change of reticles for different measurement tasks.
Collimators with double micrometer allow the setting of defined image angles in two directions.
The movement of the reticle in x- and y-direction in the focal plane is measured with measuring drums. The scale division is 5 micrometer.
COLLIMATORS
Collimators with ADJUSTABLE FOCUS Setting
Measuring tasks requiring different wavelengths of light or measurements requiring variable focus (finite and/or infinite) are best accomplished using focusable collimators. With the aid of the tube extension the position of the reticle in respect to the focal plane of the objective is changeable. As a result of that the former parallel beam converts into a convergent or divergent beam and yields a real or virtual image of the reticle.
For more information on any of our three categories of ADJUSTABLE FOCUS collimators, click on one of the images below.
We offer collimators with adjustable focus setting with different focal lengths, diameters and adjustment ranges.
Adjustable focus collimators with reticle turret provide 6 selectable reticles. The reticle turret allows a quick change of reticles for different measurement tasks.
The distance between reticles and objective is adjustable.
Adjustable focus collimators with double micrometer allow the setting of defined field angles in two directions.
The lateral movement of the reticle in x- and y-direction in the focal plane is measured with micrometer drums. The scale division is 5 micrometer. The distance between reticle and objective is adjustable.
COLLIMATORS
MOTORIZED Collimators Type KM
The motorized collimators of the KM product line were developed for the "Active Alignment" of cameras for the automotive industry. The high-precision linear motion guide, modular design and simple command structure allow customers to integrate these OEM collimators into their custom measurement setups easily.
COLLIMATORS
Recommended Accessories
Vermont Photonics offers all of the MÖLLER-WEDEL OPTICAL GmbH collimator accessories providing a perfect match for your application or measurement tasks with a visual collimator.
To learn more about these components, click on one of the four buttons below.
We also recommend contacting us to discuss your specific applications.
RECOMMENDED ACCESSORIES
Attachment Achromats
Can be mounted to a D40 or D65 objective tube to focus collimated beams of collimators, testing telescopes or autocollimators to a specific finite distance.
Art. No. Description Comment
221 048 VA f=50 D10 M36x0.75
221 051 VA f=90 D16 M36x0.75
221 053 VA f=140 D28 M36x0.75
221 055 VA f=200 D28 M36x0.75
221 059 VA f=300 D28 M36x0.75
221 063 VA f=500 D28 M36x0.75
221 067 VA f=600 D28 M36x0.75
221 061 VA f=300 D50 M60x1 only on request
221 065 VA f=500 D50 M60x1 only on request
Collimator Overview
All Models
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Collimators: All Models
Collimators: Brief Introduction