Optical Bonding

In larger lens systems, two or more components are often bonded together. This is because a single lens or prism refracts light to varying extents, resulting in a colour spectrum for a prism and chromatic aberration in lenses. These aberrations are corrected by combining two or more lenses made of different types of glass. Modern microscope, camera, smartphone and photography optics often consist of three to ten separate lenses.

The lenses and prisms are joined with a thin film of adhesive or optical cement, which acts as an achromatic lens and matches the lenses’ refractive index. So as not to impair the quality of the optics, these special adhesives and optical cements must have an extreme degree of purity and low shrinkage to prevent stress on the glass lenses.

The table below lists a selection of optical cements that are suitable for bonding lenses and optical bonding. Further adhesives and custom solutions are available on request.

Optical cement/adhesive ApplicationViscosity [mPas] Base Curing*
Vitralit® 1505 optical bonding250-400 epoxy UV
Vitralit® 1527 optical bonding600-1,250 epoxy UV
Vitralit® 1528 optical bonding350-850 epoxy UV
Vitralit® 1605 optical bonding300-500 epoxy UV
Vitralit® 6127 optical bonding20-100 acrylate UV
Vitralit® 6008 VLV optical bondinglow viscosity acrylate UV

*UV = 320 - 390 nm          VIS = 405 nm