Cookie Policy

We use cookies to make our web site better. We will treat any information provided by you in confidence and will not disclose information to third parties unless required to do so by law.

Information that we request from you

Any information we collect from you for a specific purpose will be used in full compliance with Data Protection Principles. This information includes:

  • your name, age, address, telephone numbers, fax number and e-mail address
  • details of the ways in which you are happy to receive information from us.


Use of information collected

Any domain name information that we collect will not be used to personally identify you and instead is aggregated to measure the number of visits and the average time spent on individual pages. This information is used to make our website better.

When personal information is required, we will let you know how we intend to use it. This might be to offer specific products and services.

Powerphotonic Limited may use your information to contact you for your views on our products and services.

By using the website and choosing to allow us to use cookies you consent to us using your personal information for the specific purposes described above.

Use of cookies

Cookies are small amounts of information which we may store on your computer to enable our server to collect certain information from your web browser. Cookies in themselves do not identify the individual user, just the computer used. Cookies make it easier for you to log on to and use the website during future visits.

It also allows us to monitor website traffic, to identify you when you visit this website, to personalise the content of the Website for you and to enable you to both carry out transactions and have access to information about your account.

Cookies themselves only record which areas of the website have been visited by the computer in question, and for how long. Allowing us to create a cookie does not give us access to the rest of your computer and we will not use cookies to track your online activity once you leave our website. Cookies are read only by the server that placed them and are unable to execute any code or virus.

With most Internet browsers, you can erase cookies from your computer hard drive, block all cookies or receive a warning before a cookie is stored. If you want to know how to do this please look at the help menu on your web browser. However, please note that switching off cookies will mean that you may not be able to use certain features on our website.

Find out more about the use of cookies and on how to switch off cookies on or


The information you provide to us will be held on a server in the United Kingdom and may be accessed by employees whose role it is to process complaints, comments, compliments, requests under Freedom of Information and Data Protection legislation.

This information shall not be disclosed to any third party unless Powerphotonic Limited is required to do so by law.

Other websites

Our website may contain links to other websites which are outside our control and are not covered by this Privacy Policy. By continuing to use this website, you are considered as understanding and agreeing to the contents of this statement.

Data retention, security of information collected, internet based transfers and disclaimer

Powerphotonic Limited will retain your information for a specific period of time.

We employ strict physical, electronic, and administrative security measures to protect your information from access by unauthorised users.

Given that the Internet is a global environment, using the Internet to collect and process personal information necessarily involves the transmission of data on an International basis.

Therefore, by browsing this website and communicating electronically with us, you acknowledge and agree to our processing of personal information in this way.

Whereas Powerphotonic Limited employs reasonable measures to protect against viruses and other harmful components, the nature of the internet is such that it is impossible to ensure that your access to the website will be uninterrupted or error-free, or that this website, its servers or emails which may be sent by us are free of viruses or other harmful components.

Accessing, updating and contacting us

Should you wish to contact Powerphotonic Limited with regard to this site you can find out how to do so in the Contact Us section.


Clear Aperture

PowerPhotonic Lens Calculators

Conic Constant

PowerPhotonic Lens Calculators

The conic constant describes the curve obtained as a conic surface intersects with a plane. There are three general types of conic section: Hyperbola, Parabola and Ellipse (a Circle is a special Ellipse).

Please enter the appropriate constant as shown in the image.

Image by: By 0x30114 at English Wikipedia, CC BY-SA 3.0,

Input Beam Diameter (din) 1/e²

PowerPhotonic Lens Calculators

Input Beam Diameter (din) 1/e²

PowerPhotonic Lens Calculators

Output beam size definition by shape type

PowerPhotonic Lens Calculators