Doublet lens element YAG-BBAR

cylindricalachromaticlaser

Product Overview
TECHSPEC® YAG-BBAR coated cemented achromatic doublets are two-element lenses designed to correct on-axis spherical and chromatic aberrations. They incorporate a YAG-BBAR broadband anti-reflective coating optimized across 500–1100 nm with <0.25% absolute reflectivity at 532 nm and 1064 nm, and are intended to minimize spot size for polychromatic illumination. These doublets can also be used for focusing Nd:YAG lasers, including systems with alignment beams.

Key Features

• YAG-BBAR broadband AR coating, designed for 500–1100 nm
• Optimized for <0.25% absolute reflectivity at 532 nm and 1064 nm
• Economical cemented doublet alternative to air-spaced focusing doublets

Common Specifications (selected)

• Centering (arcmin): <1
• Bevel: Protective as needed
• Focal Length Tolerance: ±1%
• Focal Length Specification Wavelength: 587.6 nm
• Surface Quality: 40-20
• Coating: YAG-BBAR (500–1100 nm)
• Power (P-V) @ 632.8 nm: 1.5 λ
• Irregularity (P-V) @ 632.8 nm: λ/4
• Usable Wavelength Range: 500–1100 nm

Intended / Typical Applications

• Polychromatic focusing where minimized spot size is required
• Focusing Nd:YAG lasers and laser systems, including alignment beams
• Optical systems requiring broadband AR performance from visible to near-IR

Technical Characteristics / Specifications

• Configuration: Cemented achromatic doublet (two optical elements cemented)
• Coating details: YAG-BBAR, optimized for 500–1100 nm; <0.25% absolute reflectivity at 532 nm and 1064 nm
• Transmission: Broadband transmission across 500–1100 nm
• Focal Length Spec. Wavelength: 587.6 nm
• Focal Length Tolerance: ±1%
• Centering: <1 arcmin
• Surface Quality: 40-20 (scratches/digs)
• Power (P-V) @ 632.8 nm: 1.5 λ
• Irregularity (P-V) @ 632.8 nm: λ/4
• Bevel: Protective as needed