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GCL-0107 Negative Achromatic Doublets

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GCL-0107 Negative Achromatic Doublets

An achromatic-doublet consists of a negative low-index(crown glass)cemented with a positive high-index(flint glass)lens. These lenses are computer-optimized for infinite conjugate ratio. While the output rays do not actually meet to form a real point, they appear to be diverging from a virtual point located on the object side of the lens.

• Material: Optical glass (crown and filnt)
• Focal Length (f'): ±2% at 587.6nm
• Diameter(φ) Tolerance: +0.0/-0.10
• Center Thickness(Tc): ±0.1
• Centration: 3′
• Form Error: 1~5 fringes
• Irregularity of Fringes: 0.2~0.5 fringes
• Surface Quality: 60-40 scratch-dig
• Coating: 1/4 wave MgF2 coating at 550nm for 0° angle of incidence
• Clear Aperture: 90% diameter

GCL-0107 Negative Achromatic Doublets

Part No.	ø	f'	fb	Tc	Te	Weight(g)
GCL-010711	25.4	-30	-36.15	12.0	16.71	28.5
GCL-010712	25.4	-40	-44.4	8.5	11.97	20.1
GCL-010713	25.4	-50	-53.37	6.6	9.32	15.6
GCL-010714	25.4	-75	-77.65	6.6	9.13	10.7
GCL-010715	25.4	-100	-102.37	4.6	5.95	10.4
GCL-010716	25.4	-150	-152.6	6.6	7.87	10