Paul Ruben's List of Questions for Custom Lens Design
Below are the engineering
questions that need to be answered in order to complete a custom lens design
that is fully suited for its intended use. If you already know what all these
questions mean and are ready to answer them, you are already a good ways along
the road of designing the lens.
If not, not to worry: fill
out this form as much as possible and click Send Request below, click
here to download a Word document
version of this form, or call the ImportOptics.com team, and we’ll help
translate these questions into understandable English, and get your design
Select from List:
Describe the product, system use, and operation:
Design Due Date
unusual requirements or characteristics distinguish it from existing
the required focal length, or object-to-image distance for a
Is there a minimum back
as a ratio, such as 10X or 1/2X.
What is the
object-to-image distance, with tolerances?
angular field, or the object and image size, with tolerances.
the maximum relative aperture?
aperture, if any?Express
either as an f-number, numerical aperture, or working f-number or
numerical aperture for finite conjugate systems.
there a T-stop requirement?
Illumination or Vignetting
any unusual vignetting requirements. Does required corner illumination
include cos4 factor?
principal wavelength and range.
spectral response of system if known, or spectral sensitivity of receptor.
any mechanical limiting dimensions or spacing which might affect the
space envelop available?
Identify and explain any requirements for special materials.
you define resolving power or MTF, or compare quality to an existing
there a tolerance for focus shift, distortion, lateral color, and field
Identify special requirements for temperature, pressure, humidity, shock,
or focus athermalization.
the size or location of the exit pupil and eye distance important? If so,