First tell the technical staff what your lens application is, which will help the technical staff to help you analyze the design indicators. Of course, some applications are designed to be trade secrets, so it's a different matter.

The spectral range of the lens application, because the lens design must consider the characteristics of chromatic aberration, material, etc., it is necessary to know the spectral range of the lens when it is in use.In other words, you use monochromatic light, such as red light, green light, blue light and other monochromatic light, or the full spectrum of white light, or near-infrared, short-wave infrared, medium-wave infrared, and long-wave infrared lights.

The focal length f of the lens, the field of view angle FOV, and the size of the CCD sensor, why are these three technical indicators said together, because they have a conversion relationship: field of view=2×arctan (CCD size/(2× focal length)) These concepts are well understood. The field of view angle is the field of view of the lens. The longer the focal length, the larger the target is enlarged, and the smaller the field of view angle.

Aperture F/Numerical aperture NA, the size of the aperture determines the amount of light in the lens, but also affects the resolution of the lens.Usually, the greater the amount of light intake, the higher the brightness of the image surface. Optical systems with large apertures should be used in low-brightness environments. Of course, the larger the aperture, the more difficult the lens design is, the higher the lens complexity, and the cost will increase. We should find a balance between the use requirements and cost.

Numerical aperture and aperture have the same effect. Photographic objective lenses usually mark the aperture size, while microscope lenses usually mark the numerical aperture size.Note: The larger the aperture value, the smaller the aperture. For example, F1.4 is a large aperture lens and F16 is a small aperture lens.