Laser Projection Technologies
Frequently Asked Questions
Where are we located and what do we do?
Laser Projection Technologies, Inc. is a privately-held, venture-backed corporation headquartered in Londonderry, New Hampshire, USA. The factory and main offices are located directly outside the Manchester-Boston Regional Airport approximately 50 miles north of Boston.
We make accurate, high-speed, long-range three-dimensional laser projection and measurement systems designed for use in manufacturing applications requiring precise component alignment. Our 3D laser projectors project a glowing template directly onto a work surface. Projections of this kind are used by operators as production guides; as such, they make obsolete some conventional assembly methods which use either templates or hard ply alignment tools.
Our systems and methods have been successfully implemented in a wide variety of industries to help streamline production, improve quality, and reduce costs. Since LPT was incorporated in 1996, we have been providing solutions to many satisfied customers all over the world.
What is 3D laser projection and how is it produced?
A single laser beam is directed at a pair of mirrors steered by moving-magnet scanners called galvanometers. This system is capable of extremely rapid movement, and with proper steering of the mirrors, it produces the desired laser beam trajectory through a series of specific points in space.
The beam is directed precisely at each given moment of time towards a given point on the surface of a three-dimensional object and produces a visible pattern.
This high-speed repetitive motion of the focused laser beam causes the human eye to perceive a continuous line, a glowing three-dimensional template commonly referred to as "laser projection".
Where and how do LPT solutions add value?
LPT laser projectors are used extensively throughout manufacturing industries to help streamline production and reduce costs in various applications. These are just a few.
- Heavy Equipment
- Assisted Assembly
- Click Bond Location
- Part Placement
- Ply Lay-Up
- Paint Templating
Does LPT sell and maintain laser projectors globally?
Yes. Laser Projection Technologies Inc. is a US-based company with a global outreach: there are LPT projectors at work on every continent. We maintain an extensive network of distributors throughout Europe, Asia, and North America while also selling direct to select key accounts and accounts not covered by distributors. With sales and service representatives around the globe, customers have access to an LPT specialist 24 hours a day.
Why choose LPT?
LPT is not the only manufacturer of 3D laser projection systems, but there are three major points of difference between us and other producers of similar equipment.
- Thanks to a superior mathematical foundation and advanced trajectory control, the speed and accuracy of LPT laser projectors is unrivalled.
- LPT focus is not limited to laser projection and also encompasses metrology and measurement capabilities.
- What truly sets LPT apart from the competition is the spirit of innovation, which has guided the company since its inception and which has produced unique laser projection systems and solutions such as targetless alignment, laser radar projectors, and lasergrammetry.
What is LPT's laser source?
A laser is a device that emits light (electromagnetic radiation) through a process of optical amplification based on the stimulated emission of photons. The term "laser" originated as an acronym for Light Amplification by Stimulated Emission of Radiation (LASER) and emitted light is notable for its high degree of spatial and temporal coherence, unattainable using other technologies.The standard laser source in LPT projectors is the frequency-doubled "diode pumped solid state" or DPSS laser. LPT´s lasers emit a </= 5mW output in the 532 nm (green / visible spectrum).
Do I need protective eye wear when using LPT projectors?
Basically, the answer is NO.
Lasers in LPT projectors produce a beam in the visible spectrum (532 nm / green laser) with 5mW laser output and are considered to be a CDRH rated Class IIIa / IEC rated Class 3R lasers not requiring any special eye protection.
Looking at an LPT laser projection on an object´s surface with unprotected eyes is completely safe. Prolonged eye exposure to direct laser light can be dangerous, but such exposure cannot happen by accident, and the rule is: NEVER STARE directly into the beam coming out of the laser window of an LPT projector. Should your eyes momentarily catch the beam - a fairly routine occurrence when working with lasers - you are likely to instinctively avert them due to the natural blink reflex.
How accurate are LPT's laser projectors?
Answer:Accuracy figures for some LPT projector models at 2 sigma / full field:
|LPT4 Laser Projector||+/- 0.015 in (0.38 mm) @ 15 feet (4.57 m)|
|LPT8 Laser Projector||+/- 0.015 in (0.38 mm) @ 15 feet (4.57 m)|
|LPT12 Laser Projector||+/- 0.010 in (0.25 mm) @ 15 feet (4.57 m)|
What is the range of accurate projection for LPT projectors
Answer:Projection range depends on the model.
|LPT4 Laser Projector||2 ft to 20 ft (0.61 m- 6.09 m)|
|LPT8 Laser Projector||6 ft to 50 ft (1.83 m- 15.24 m)|
|LPT12 Laser Projector||Standard: 6 ft to 50 ft (1.83 m- 15.24 m) Factory Configurable: 2 ft to 45 ft (0.61 m- 13.72 m)|
How do I control / operate LPT's laser projectors?
An external computer is required to operate LPT´s laser projectors. A single computer can operate multiple projectors and a single computer can control up to 250 projectors.
|Operating System||Windows 7 (32-Bit)||Windows 7 (64-Bit)|
|Processor||1.6 gigahertz (GHz)||3.60 gigahertz (GHz)|
|Memory||130 megabytes (MB) RAM (per session)||130 megabytes (MB) RAM (per session)|
|Hard Drive||16 GB available hard disk space||16 GB available hard disk space|
|GUI / UI||1024 X 768 resolution||1024 X 768 resolution|
|Connections||CAT 6 Ethernet: 100Base-T||CAT 6 Ethernet: 1000Base-T|
|Controls||Keyboard & Mouse||RF Remote Combo|
Do I need special software to implement LPT laser projectors?
Yes, the RayTracer™ Software Suite - containing the RayTracer Operator and RayTracer Administrator programs - is required to operate an LPT laser projector. LPT provides this software package with every projector shipped at no additional cost.
Customers may also choose to use an additional third-party software package that can directly create XML files in the proper format for LPT´s projectors to utilize for projection (i.e. RayTracer CAM, Fibersim, TruLASER View, Verisurf, et al).
What functions do the RayTracer™ Software Suite components perform?
RayTracer Operator is used to directly run a laser projector. It features a Windows-based graphical user interface (GUI) that allows control of laser projection by selecting pre-configured jobs, reference tool sets, parts and their layers for projection, running alignment, pausing and continuing projection, view projected text and work instructions, etc. RayTracer Operator is designed for a manufacturing environment.
RayTracer Administrator is used to set up a RayTracer Database, manipulate its components, configure jobs and control parameters, edit projection data and reference tool data, create user log-in names and passwords, etc. Its Windows-based GUI allows multiple document handling, copying and pasting, layerized tree structure viewing, and other options. RayTracer Administrator is intended to be used by a manufacturing process engineer that prepares laser projection jobs by selecting, organizing, and storing necessary data into one or more RayTracer databases.
Do I need to use targets for operating LPT laser projectors and why?
That depends on the model of LPT projector you plan to use. Retro-reflective targets are an integral part of all conventional laser projection systems (LPT4, LPT8), so for these models, the answer is YES. During alignment, these targets are scanned by the projector and reflect the laser beam back to the projector where the target position is compared to known coordinates. The combination of all the scanned targets provides coordinate positions of the projector in space as compared to the tool or part, thus allowing the system to project with proper accuracy.
Targetless laser projection systems, such as the LPT12 and LPT15, while also capable of alignment using retro-reflective targets, do not require them due to geometric feature scanning capabilities. Features can include corners, edges, holes, fasteners etc., located from the CAD model data. Therefore, with LPT12 and LPT15, target use is optional.
Does LPT supply targets?
Answer:Yes. LPT-supplied retro-reflective targets come in two different heights and five different angles; they are sold in batches of 10.
|Angle||1/2 in (12.7 mm) PN||5/16 in (7.94 mm) PN|