The LBTEK achromatic fixed-magnification beam expander is based on the structure of a Galilean telescope. It consists of a negative lens made of high-transmittance optical material and an achromatic doublet positive lens. It can expand or reduce the diameter of a parallel incident beam within the operating wavelength to a fixed magnification. The transmitted wavefront difference after expansion or reduction is less than λ/4, with minimal aberration and minimal impact on beam quality. The adjustment ring at the waist is used to adjust the divergence angle of the output beam, taking into account the needs of non-collimated beam expansion. During rotation of the adjustment ring, a special mechanical design ensures that the internal lens only moves forward and backward, without rotating with the mechanical ring. This design effectively minimizes beam position deviation during divergence adjustment, making the beam expander more stable and reliable. The input and output terminals are designed with threads of different sizes; the waist can be mounted using a clamp.

The LBTEK achromatic fixed-magnification beam expander is based on the structure of a Galilean telescope. It consists of a negative lens made of high-transmittance optical material and an achromatic doublet positive lens. It can expand or reduce the diameter of a parallel incident beam within the operating wavelength to a fixed magnification. The transmitted wavefront difference after expansion or reduction is less than λ/4, with minimal aberration and minimal impact on beam quality. The adjustment ring at the waist is used to adjust the divergence angle of the output beam, taking into account the needs of non-collimated beam expansion. During rotation of the adjustment ring, a special mechanical design ensures that the internal lens only moves forward and backward, without rotating with the mechanical ring. This design effectively minimizes beam position deviation during divergence adjustment, making the beam expander more stable and reliable. The input and output terminals are designed with threads of different sizes; the waist can be mounted using a clamp.

The LBTEK achromatic fixed magnification beam expander is based on the structure of a Galilean telescope. It consists of a negative lens made of high-transmittance optical material and an achromatic doublet positive lens. It can expand or reduce the diameter of a parallel incident beam within the operating wavelength to a fixed magnification. The transmitted wavefront difference after expansion or reduction is less than λ/4, with minimal aberration and minimal impact on beam quality. The adjustment ring at the waist is used to adjust the divergence angle of the output beam, taking into account the needs of non-collimated beam expansion. During rotation of the adjustment ring, a special mechanical design ensures that the internal lens only moves forward and backward, without rotating with the mechanical ring. This design effectively minimizes beam position deviation during divergence adjustment, making the beam expander more stable and reliable. The input and output terminals are designed with threads of different sizes; the waist can be mounted using a clamp.