Thorlabs offers aspheric condenser lenses, either with or without a diffuser surface on the plano side. These optics, which are designed for collimating light from a lamp, LED, or similar light source with a highly uniform illumination pattern, are available uncoated for use in the 380 - 2100 nm range or with an antireflection coating for either 350 - 700 nm or 650 - 1050 nm.