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GCL-010207 BK7 Bi-Convex Lenses

13.8

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13.8

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GCL-0102 BK7 Bi-Convex Lenses

Similar to plano-convex lenses, a bi-convex lens has a positive focal length and focuses parallel rays of light to a spot. Because the front and back surface of the lens are spherically convex and have the same radius of curvature, in situations where the object and image are at equal of near equal distances from the lens, it particularly minimizes spherical aberration, at the same time, aberration coma and distortion are also identically canceled. As a guideline, bi-convex lenses offer minimum aberrations at the conjugate radio between 5:1and1:5.

• Focal Length (f'): +/-2% at 5μm
• Diameter(φ) Tolerance: +0.0/-0.20
• Center Thickness(Tc): ±0.1
• Centration: 3′
• Form Error: 3 fringes
• Irregularity of Fringes: 0.5 fringes
• Surface Quality: 60-40 scratch-dig
• Clear Aperture: 90% diameter
• Uncoated

GCL-0102 BK7 Bi-Convex Lenses

Part No	Ø	f'	fb	Tc	Te	weight
GCL-010201	6	19	18.1	3	2.5	1
GCL-010215	10	15	13.7	4.2	2.5	1
GCL-010216	10	30	28.7	3.9	3	1
GCL-010202	12.7	25.4	23.7	5	3.4	2
GCL-010203	12.7	38.1	36.7	4	3	2
GCL-010217	20	30	28	5.9	2.5	4
GCL-010218	20	40	37.9	5	2.5	3
GCL-010219	20	60	59	4.7	3	3
GCL-010220	20	75	73.7	4.4	3	3
GCL-010204	25.4	50.8	49.1	6	2.8	6
GCL-010205	25.4	100	98.5	5	3.4	6
GCL-010206	25.4	150	148.6	5	4	6
GCL-010207	25.4	175	172.7	5	4.1	6
GCL-010221	30	60	57.6	7	3.3	7
GCL-010222	30	120	118.7	5	3.2	7
GCL-010223	30	180	178.5	5	3.8	8
GCL-010224	30	250	248	5	4.1	9
GCL-010225	30	300	298.1	5	4.3	9
GCL-010226	40	100	97	8	4	20
GCL-010227	40	150	148.5	6	4	16
GCL-010228	40	250	247.9	5.6	4	16
GCL-010212	50.8	150	148.1	8	3.8	30
GCL-010213	50.8	250	248.8	6	3.5	25
GCL-010214	50.8	400	398.2	6	4.4	28