Plano-concave Lenses present a concave surface and a plano surface. They have a negative focal length and are used for image reductinon or to spread light. These lenses diverge collimated incident light and form virtual images which are seen through the lens. They are often used to expand light or to increase focal lengths in existing systems.

Specifications:
Material:----------------------------------------------N-BK7, Fused Silica, N-SF10, Silicon, Ge,CaF2, etc.
Diameter Tolerance:----------------------------+0.0/-0.15mm
Focal Length Tolerance (mm):---------------+/-2%
Centration:-----------------------------------------<3 arc minutes
Clear Aperture:------------------------------------>85%
Surface Figure (per 25mm@632.8nm)----<1.5λ
IRR ( @632.8nm)---------------------------------<λ/4
Surface Quality:------------------------------------60/40
Protected Bevel:-----------------------------------<0.25mmx45deg
Coating:---------------------------------------------uncoated, AR, HR, PR Coating, etc.

N-BK7 Plano Concave Lens

Design wavelength: 546.1nm Design Index:1.5183 ± 0.0005

Part No.	f (mm)	dia (mm)	R1 (mm)	tc (mm)	te (mm)	fb (mm)	Illustration
PCV1201	-15.0	12.7	7.78	2.0	5.3	-16.3
PCV1202	-20.0	12.7	10.37	2.0	4.1	-21.3
PCV1203	-25.0	12.7	12.96	2.0	3.7	-26.3
PCV1204	-30.0	12.7	15.55	2.0	3.4	-31.3
PCV1205	-40.0	12.7	20.73	2.0	3.0	-41.3
PCV1206	-50.0	12.7	25.92	2.0	2.8	-51.3
PCV1301	-25.0	25.4	12.97	2.0	10.9	-26.3
PCV1302	-35.0	25.4	18.14	2.0	7.2	-36.3
PCV1303	-50.0	25.4	25.92	2.0	5.3	-51.3
PCV1305	-75.0	25.4	38.87	2.0	4.1	-76.3
PCV1306	-100.0	25.4	51.83	2.0	3.6	-101.3
PCV1307	-150.0	25.4	77.75	2.0	3.0	-151.3
PCV1308	-200.0	25.4	103.66	2.0	2.7	-201.3

Plano Concave Lens - Fused Silica

Design wavelength: 546.1nm Design Index:1.46008

Part No.	F(mm)	f(mm)	R(mm)	Tc	Te	Fb	Illustration
PCV2101	12.7	-15.0	6.92	2.0	6.17	-16.41
PCV2102	12.7	-20.0	9.20	2.0	4.54	-21.38
PCV2103	12.7	-25.0	11.51	2.0	3.91	-26.38
PCV2104	12.7	-30.0	13.80	2.0	3.55	-31.37
PCV2105	12.7	-40.0	18.41	2.0	3.13	-41.38
PCV2201	25.4	-35.0	16.11	2.0	8.20	-36.36
PCV2202	25.4	-50.0	23.01	2.0	5.82	-51.38
PCV2203	25.4	-75.0	34.51	2.0	4.42	-76.38
PCV2204	25.4	-100.0	46.03	2.0	3.79	-101.42
PCV2205	25.4	-150.0	69.02	2.0	3.18	-151.39
PCV2206	25.4	-175.0	80.54	2.0	3.01	-176.43
PCV2207	25.4	-200.0	92.04	2.0	2.88	-201.42
PCV2208	25.4	-250.0	115.08	2.0	2.70	-251.50
PCV2209	25.4	-300.0	138.04	2.0	2.59	-301.41
PCV2210	25.4	-500.0	230.10	2.0	2.35	-501.50
PCV2211	25.4	-1000.0	460.10	2.0	2.18	-1001.42
PCV2401	38.0	-50.0	23.01	3.0	13.03	-52.07
PCV2402	38.0	-100.0	46.03	3.0	7.10	-102.10
PCV2403	38.0	-150.0	69.02	3.0	5.67	-152.07
PCV2404	38.0	-200.0	92.04	3.0	4.98	-202.11
PCV2405	38.0	-350.0	161.06	3.0	4.13	-352.13
PCV2406	38.0	-500.0	230.10	3.0	3.79	-502.19