Welcome to the Summer 2014 edition of 'Lens Innovation' - a periodic eNewsletter from Resolve Optics Ltd. designed to keep you informed about the latest technological developments, applications advances and breaking news in optical design and manufacture.

If a particular feature interests you do not hesitate to contact us or follow the link for further information. We welcome your feedback.

Mark Pontin (Managing Director)

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Technology Forum

Designing optical systems for high temperature environments

Optical systems for high temperature applications need to be carefully designed to ensure performance is maintained at the application operating temperature. When materials heat up there is expansion. The rate of expansion differs depending on material types. To avoid the optical system going out of focus as it reaches operating temperatures you must take careful consideration of the rate of expansion of components and air spaces. Temperature also affects the refractive index of materials so this needs to be taken into account as well.

Athermalisation of optical systems ensures that the performance is maintained over a given temperature range. However, for high temperatures there are more considerations that have to be accounted for. When materials expand or contract at different rates it can lead to elements cracking or becoming loose in their mount. If you add vibration into the mix you now have the risk of elements dropping out or worse chaffing. Chaffing is where the glass element becomes lose enough for the vibration to rattle the element causing the glass to wear against the mount which produces white dust. To avoid this the material used to mount the glass must have a similar expansion coefficient. This can be difficult and may require the use of two or three materials with varying expansion coefficients that will work together to maintain the glass in position.

For high-temperature environments - Resolve Optics has considerable experience of developing optical systems that will operate up to 950°C without cooling. This make it possible to inspect the inside of an operating furnace / boiler or non-invasively analyse high temperature processes including incineration, recycling, smelting and chemical manufacturing.

To discuss a specific high temperature project please contact Resolve Optics on +44-1494-777100 or email markpontin@resolveoptics.com.

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Product Focus

Specialist infrared (IR) lenses

To realise the potential of technological advances in many industries the need for very high performance, high-resolution or large format Infrared lenses and lens systems that meet the exact needs of customers has risen dramatically. Drawing upon over 20 years of lens design and manufacture experience – Resolve Optics has provided a growing number of thermal camera, sensor and instrument manufacturers with optimised single and multiple element lenses, zoom lens and beamsplitters that operate in the Infrared (IR) region (1-14 microns). To discuss a no-compromise optimised IR lens to enhance the performance of your product please click here or contact Resolve Optics on +44-1494-777100 or email sales@resolveoptics.com


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60 Second Quiz... test your optics knowledge!

Q1: According to the ray model of light, how does light behave ?
Q2: What happens to light when it hits a translucent surface ?
Q3: When a single light source casts shadows of two objects, the larger shadow
       is _______ the light source ?
Q4: The imaginery line perpendicular to a reflecting surface is called _______
Q5: Refraction is caused by light changing _______ as it moves from one medium to another.
Q6: The point where light rays converge is called what ?

Please see bottom of newsletter to check your answers.

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Optical design: Chicken or the egg ? by Mark Pontin

Which comes first when designing a new or updated product, the lens or the sensor? It has been my experience that generally the lens is always the last part of a system to be considered. Of course as the Managing Director of a company designing and manufacturing lenses this seems a strange approach as without a lens you do not have an image.

Let's consider the following scenario. You have a 50 Megapixel camera with a 1-inch sensor that will work perfectly for your application and all you need now is a lens. If the camera has been developed there must surely be lenses for it ? Not so at all. Typically off-the-shelf lenses are only produced for standard sensor sizes. So if your sensor is unusual in terms of size and or photopic response you may well struggle to find a suitable lens.

The real answer to the question is that both the lens and sensor should be considered at the same time. This will enable you, with the help of Resolve Optics, to quickly identify if a custom design is required and thereby avoid delays in developing an optimised total optical solution for your application.

For a free no-commitment discussion on whether your product development would benefit from a custom lens design please contact Resolve Optics on +44-1494-777100 or email sales@resolveoptics.com

Case Study

Close cooperation provides integrated solutions for nuclear monitoring

Custom Cameras Ltd. is a highly respected engineering company with over 30 years of design experience in industrial camera technology. The company specialises in production of camera systems built to withstand high levels of nuclear radiation, operate in hostile environments, offer high spectral sensitivity and operate underwater to depths of up to 50 metres. Over the last 10 years – Resolve Optics Ltd. has supplied a range of non-browning fixed focus and zoom lenses enabling Custom Cameras to provide optimised remote camera systems for applications including inspection of nuclear fuels rods for oxidation, deterioration or damage ; checking the integrity of nuclear fuel chambers and monitoring low level radioactive storage containers.

Tony Moon, Sales Director of Custom Cameras commented "The reasons we elect to source from Resolve Optics is down to their in-depth knowledge of the requirements of lenses to be used in a nuclear environment, willingness and ability to adapt designs to suit customer requirements, excellent technical support and competitive pricing".

To discuss an optimised non browning lens for your nuclear application please contact Resolve Optics on +44-1494-777100 or sales@resolveoptics.com.

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New website launched

Resolve Optics has launched a new website. Managing Director of Resolve Optics - Mark Pontin commented "The purpose of our new third generation website is to provide information to demonstrate how 'designed-for-purpose' specialist lenses are often the best solution for engineers and designers looking to enhance the performance, broaden the application capabilities, reduce the size or improve the visual appearance of their product". Located at www.resolveoptics.com the website offers fast and easy access to case studies, articles, capabilities video and back issues of the company newsletter to provide an informative introduction to the company’s OEM lens design and manufacture service.

Go to website


In the pipeline

Resolve Optics Ltd is currently designing a new Model Z3 – an ultra compact 3x High Definition (4k) Zoom lens for 2/3-inch cameras. Providing users with 4k resolution throughout its range of operation - the Model Z3 is just 73 mm long, 40mm diameter and much lighter (<450g) than other comparable zoom lenses.

The high performance f/2.8, 3x tracking zoom, on the Model Z3 ensures the image stays in focus throughout the zoom travel. The Model Z3 is also able to focus upon objects from 200mm to infinity. A novel design camera mount cleverly incorporates topside and back focus adjustment so that the lens can quickly and easily be set-up on any 2/3-inch format camera.

For further information on the new Model Z3, lens, please contact Resolve Optics on +44-1494-777100 or sales@resolveoptics.com.

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  VISION 2014... book the dates

Resolve Optics has announced that it will be exhibiting at VISION 2014 in Stuttgart, Germany (4-6th November 2014). Whether you are looking for an optimised custom lens or off-the-shelf optics for your sensor, camera or instrument system we invite you to come and talk with our experienced team of specialists on Stand I 22 / Halle 1.
For further information please click here.

ANSWERS: Q1: It travels in a straight line Q2: It scatters Q3: Closer to Q4: the Normal Q5: Speed Q6: The focal point

Resolve Optics Ltd, Asheridge Road, Chesham, Buckinghamshire HP5 2PT, UK.
T: +44 (0) 1494 777100 - F: +44 (0) 1494 775201 - E: sales@resolveoptics.com