Negative Achromatic Lenses, D=12.50mm, F=-25.00mm, VIS BK7/F2, United Optical Technology Co., Ltd (CAT#: STEM-OP-1863-YJL)

Negative Achromatic Lenses, D=12.50mm, F=-25.00mm, VIS BK7/F2, model 145187, is manufactured by United Optical Technology Co., Ltd.
Achromatic lenses, also known as doublet lenses, are made of two lenses made of materials with different refractive indexes and dispersion rates. For better performance, the side with a larger radius of curvature (the flat side) should face away from the collimated beam. In addition, the achromatic design also helps light sources with a wide wavelength range (composite light sources) to maximize imaging aberration and reduce spherical aberration and chromatic aberration. Achromatic lenses produce clearer images than optical systems using a single lens, further improving the optical performance of the lens. Achromatic lenses are suitable for a variety of applications such as fluorescence microscopy, image relay, detection or spectroscopy. Achromats create smaller spots of light than monolithic lenses.

Diameter: 12.50mm
EFL: -25.00mm
Coating: AR@400~700nm
Material: BK7/F2
BFL: -27.50mm
Curvature Radius R1: -15.60mm
Curvature Radius R2: 13.09mm
Curvature Radius R3: 44.16mm
Center Thickness CT: 5.67mm
Center Thickness CT1: 3.00mm
Center Thickness CT2: 2.67mm
Edge Thickness ET: 7.42mm
Available Mount Ring: 500039
Design Wavelength: --
Diameter Tolerance: +0.0/-0.1
Center Thickness Tolerance: ±0.2
Surface Accuracy: λ/4@632.8nm
Focal Length Tolerance: ±2%
Centering Tolerance: 3~5 arcmin
Surface Quality: 40-20~60-40
Bevel: 0.2X45°
n: --

Unassembled Negative Achromatic Lenses are achromatic doublet lenses with a negative focal length. They are used to correct chromatic aberration and can minimize or eliminate chromatic aberration. They do not have a mounting ring and need to be installed by yourself.

Negative Achromatic Lenses, D=12.50mm, F=-40.00mm, VIS BK7/F2, United Optical Technology Co., Ltd (CAT#: STEM-OP-1864-YJL)
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Negative Achromatic Lenses, D=12.70mm, F=-25.00mm, VIS N-BAF10/N-SF6HT, United Optical Technology Co., Ltd (CAT#: STEM-OP-1866-YJL)
Negative Achromatic Lenses, D=12.70mm, F=-30.00mm, VIS N-BAK4/SF5, United Optical Technology Co., Ltd (CAT#: STEM-OP-1867-YJL)
Negative Achromatic Lenses, D=12.70mm, F=-50.00mm, VIS N-BAK4/SF5, United Optical Technology Co., Ltd (CAT#: STEM-OP-1868-YJL)
Negative Achromatic Lenses, D=25.00mm, F=-30.00mm, VIS N-BAF10/N-SF10, United Optical Technology Co., Ltd (CAT#: STEM-OP-1869-YJL)