Mitutoyo Sanfeng 378-403 interference objective lens

Mitutoyo Sanfeng 378-403 interference objective lens

Mitutoyo Sanfeng 378-403 interference objective lensReplace Nikon

code name

378-005

378-400

378-401

378-402

378-403

Product Name

White light interference objective WLI Plan Apo 5x

White light interference objective WLI Plan Apo 2.5x

White light interference objective WLI Plan Apo 10x

White light interference objective WLI Plan Apo 25x

White light interference objective WLI Plan Apo 50x

7. The phenomenon where the light information (image) transmitted through the objective lens (or projection lens) gradually faints or blurs in the surrounding area due to some obstacle during the imaging process on the eyepiece (or projection screen). eighteen Glare is the phenomenon in which light diffuses within the field of view (appearing white) due to reflections inside the lens or light scattering inside the telescope tube. nineteen Double image refers to the phenomenon where an image appears to overlap due to the reflection of unwanted light within the imaging optical system or interference between optical components. twenty The pupil diameter and spot diameter of the objective lens ● The pupil diameter refers to the maximum diameter of the axial parallel beam that can enter the objective lens (rear side). The pupil diameter can be calculated using the following formula. Spot diameter refers to the diameter of the focused light when a beam with uniform intensity distribution enters the objective lens (rear side). The diameter of the light spot can be calculated using the following formula. However, the above formula is not applicable to light sources such as lasers, as their cross-sectional intensity distribution follows a Gaussian distribution. The diameter of a laser beam is usually expressed as the diameter at 1/e ² (13.5%) of the peak value, and the spot diameter of the laser can be calculated using the following formula. Pupil diameter (φ mm)=2 x N.A. x f N.A.: objective lens N.A. f: focal length of objective lens (mm)

Aperture stop is used to adjust the transmission range of light and is related to brightness and resolution. Especially when using transmission illumination to measure the width dimensions of cylindrical objects, using a suitable aperture can suppress diffracted light, allowing for accurate measurement and observation. 15. Field of view aperture This aperture is used to block light outside the observation range. Blocking unnecessary light can ensure clear imaging. 16. A flat field aperture refers to an objective lens that corrects the image plane and curvature of an achromatic lens and a complex achromatic lens, so that a planar image can be projected clearly as a planar image. All FS objectives in our company are of flat field specification