News: Industry News
18th October 2018
An easy way to view the full dimensional metrology range in one virtual showroom:
8th July 2021 • Read »
Peen marking/engraving for parts identification is a critical element in industries such as aviation, defence and medical
7th September 2020 • Read »
Shipbuilders around the world are currently facing the challenge of reducing their environmental impact. The alignment telescope is used for accurate alignment of engines, propeller shafting and stern tubes - reducing vibration and wear which cause fuel inefficiencies.
23rd April 2020 • Read »
Watch our short video to see how this handheld gauge and 3D analysis software measures chamfer, edge rounding and edge break at high speed.
16th April 2020 • Read »
Spectrum Metrology is pleased to introduce a ground-breaking handheld gauging system to the MRO Europe exhibition for rapid micro-defect/corrosion analysis directly on the shopfloor. The 4D INSPEC Â® inspection gauge is a completely new method of reliably measuring micro-defects in 3D such as scratches nicks, pits, protrusions, radius of curvature of grooves, spheres and shafts â€“ even rivet geometry.
8th August 2019 • Read »
Autocollimator used to test innovative Scanner System to monitor pollution
A team from the University of Leicester’s department of Physics and Astronomy have been developing leading space technology to monitor air pollution around Leicester and Peterborough, using a specially designed camera fitted to an aircraft. Using the Taylor Hobson autocollimator, the scientists were able to align the optics in their camera to gain the sharpest possible image for accurate and repeatable results.
The University of Leicester’s space scientists successfully carried out the tests earlier this year using an aircraft equipped with a pioneering CompAQS scanner to measure air pollution, in particular nitrogen dioxide, in the environment. The instrument is part of a major initiative to improve the UKs leadership in space instrumentation for Earth Observation and the University is hoping to send the CompAQS on a space mission in the early 2020s.
The CompAQS was designed, built and tested at the University of Leicester in collaboration with Surrey Satellite Technology Ltd and DL Optics Ltd. It monitors visible light and measures how much light is lost at specific wavelengths absorbed by nitrogen dioxide. Using this information, researchers can determine how polluted areas of the landscape are, including motorway junctions, airports, carparks and urban environments. This is valuable data to allow planners to mitigate the impact of pollution on health.
It was important to align the optics in the camera in order to gain optimum accuracy and give repeatable results. To align the optical components within the scanner a Taylor Hobson autocollimator was used.
An autocollimators main use is to measure the angle of a mirror or optical component. Using the laws of reflection, when the mirror is square to the autocollimator the reading is 0,0. In its simplest form the autocollimator can be used to align optical components by putting them all in line and square. Another feature of an autocollimator is that although it is focused at infinity for angle measurement you can add an objective lens (using a thread at the end of the barrel) and focus the autocollimator to align optical components.
This principle was used to align the optics in this specialised scanner – using the autocollimator to first measure the offset in the centre of curvature between the lens and the grating, then to align the mirror.