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★Standard lens (reference lens) for laser interferometer
We provide λ / 20 high precision standard lens (reference lens) corresponding to 4-inch (Φ100mm) and Φ60mm measurement aperture.
We have a variety lineup of reference lenses and reference planes. The transmissive spherical surface (TS) are not only condensing types (CON) but also divergent types (DIV), and the transmissive plane (TF) are not only standard, but also TF with attenuator that supports high reflectance.
Therefore, highly precise surface accuracy measurement of lenses, flat glass, reflection mirrors, wafers, etc. with a very wide range of apertures / radius of curvature is possible.

　【About abbreviation】
　　※TS : Transmission Spherical surface
　　※TF : Transmission Flat surface
　　※CON: Convergence , DIV : Divergence

★Polished products
We provide high precision λ / 20 glass planes, lenses and mirrors.
Please contact us as it is also made to order.

4-inch condenser lens

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4-inch condenser lens

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4-inch TS CON F1.5 R120

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4-inch TS CON F2.2 R200

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4-inch TS CON F3.3 R29

（※） We also have many other 4-inch condenser lenses. Please refer to the list of "List of standard lenses"
（※） Can also be mounted on a 4-inch interferometer manufactured by another company with a 2-pin mounting method.

Φ60mm condenser lens

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Φ60 TS CON R400

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Φ60 TS CON R700

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Φ60 TS CON R1000

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Φ60 TS CON R1414

（※） We also have many other Φ60mm condenser lenses. Please refer to the list of "List of standard lenses"
（※） Can be mounted on the AK-100ZF series by using the optional "4inch → Φ60 adapter"
（※） Can also be mounted on a Φ60 interferometer made by another company that uses a screw (M76 pitch 2) method.

Φ60mm divergence lens

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Φ60 TS DIV R300

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Φ60 TS DIV R400

（※） We also have many other Φ60mm divergent lenses. Please refer to the list of "List of standard lenses"
（※） Can be mounted on the AK-100ZF series by using the optional "4inch → Φ60 adapter"
（※） Can also be mounted on a Φ60 interferometer made by another company that uses a screw (M76 pitch 2) method.

Reference plane

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4-inch TF λ / 20

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6-inch TF λ / 20

（※） We also have reference planes with attenuator for high reflectance measurement such as mirrors.
Please refer to the list of "List of standard lenses"

Converter lens

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Converter lens
Φ60-20(mm)

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List of Standard lenses (Reference lenses)

We have a wide variety of reference surface lineups, and it is possible to evaluate the surface accuracy of lenses with a wide range of apertures / radius of curvature, flat glass, and reflective mirrors.

Entrance aperture	Model	F number	Exiting beam	Reference sphere R(mm)	Output aperture ΦD(mm)	Convex measuring range		Concave measuring range
Entrance aperture	Model	F number	Exiting beam	Reference sphere R(mm)	Output aperture ΦD(mm)	curvature radius(mm)	Max diameter(mm)	curvature radius(mm)	Max diameter(mm)
4-inch (Φ100mm)	TF (reference plane)	―	PARA	∞	100.0	∞	100	∞	100
	TS-CON-F0.77	0.77	CON	47.56	62.0	0-47	62	0-150	200
	TS-CON-F1.0	1	CON	80	78.0	0-80	78	0-200	200
	TS-CON-F1.3 (※)	1.3	CON	104	80.0	0-104	80	-	-
	TS-CON-F1.5	1.5	CON	120.35	82.0	0-120	82	-	-
	TS-CON-F1.8	1.8	CON	160	89.0	0-160	89	-	-
	TS-CON-F2.2	2.2	CON	195	88.3	0-195	55	-	-
	TS-CON-F3.3	3.3	CON	299.9	97.0	0-299	97	-	-
	TS-CON-F4.4 (※)	4.4	CON	440	99	0-440	99	-	-
	TS-CON-F5.0	5.0	CON	470	94.0	0-470	94	-	-
	TS-CON-F6.0 (※)	6.0	CON	577	96.0	0-577	96	-	-
	TS-CON-F7.2	7.2	CON	680	94	0-680	94	-	-
	TS-CON-F11	11	CON	1086	98.8	0-1086	98	-	-
	TS-CON-F15	15	CON	1517	98.8	0-1517	98	-	-
	TS-CON-F25	25	CON	2450	99.1	0-2450	99	-	-
Φ60mm	TF (reference plane)	―	PARA	∞	60.0	∞	60	∞	60
	TF with Attenuation	―	PARA	∞	60.0	∞	60	∞	60
	TS-CON-R400	6.7	CON	400	60.0	0-400	60	0-90	150
	TS-CON-R500	8.3	CON	500	60.0	0-500	60	0-105	150
	TS-CON-R700	12	CON	700	58.0	0-700	58	0-150	150
	TS-CON-R1000	17	CON	1000	58.0	0-1000	58	0-210	150
	TS-CON-R1200	20	CON	1200	60.0	0-1200	60	0-300	150
	TS-CON-R1414	23.5	CON	1414	60.0	0-1414	60	-	-
	TS-CON-R1700	29	CON	1700	59.0	0-1700	59	-	-
	TS-CON-R1900	31	CON	1900	60.0	0-1900	60	-	-
	TS-CON-R3000	50	CON	3000	60.0	0-3000	60	-	-
	TS-CON-R4050	67.5	CON	4050	60.0	0-4050	60	-	-
	TS-CON-R5100	85	CON	5100	60.0	0-5100	60	-	-
	TS-DIV-R200	3.3	DIV	200	65.0	-	-	200-457	150
	TS-DIV-R300	4.7	DIV	300	63.6	-	-	300-708	150
	TS-DIV-R400	6.4	DIV	400	62.7	-	-	400-957	150
	TS-DIV-R600	9.6	DIV	600	62.3	-	-	600-403	109
	TS-DIV-R700	12	DIV	700	60.4	-	-	700-1150	99
	TS-DIV-R900	15	DIV	900	61.2	-	-	900-1350	91
	TS-DIV-R1200	20	DIV	1200	61.2	-	-	1200-1650	84
	TS-DIV-R1580	26	DIV	1580	60.8	-	-	1580-2030	78
	TS-DIV-R1800	30	DIV	1800	61.3	-	-	1800-2250	76
	TS-DIV-R2200 (※)	37	DIV	2200	60.0	-	-	2200-2650	72
	TS-DIV-R2600	43	DIV	2600	60.4	-	-	2600-3050	70
	TS-DIV-R3000	50	DIV	3000	61.2	-	-	3000-3450	70
	TS-DIV-R3400	57	DIV	3400	60.4	-	-	3400-3850	68

（※） Since TS-CON-F1.3, TS-CON-F4.4, TS-CON-F6.0, and TS-DIV-R2200 are made-to-order products,
　　　please consult us in advance when manufacturing.
（※） The measuring range is shown as an approximate guide when using the Akion interferometer AK-100ZF standard stand (stroke: 600 mm).
（※） Please contact us if you require a standard lens (TS, TF) not listed above.
（※） When using the Φ60 standard lens (TS, TF), please use the separately sold "4inch → Φ60 conversion adapter ''.
（※） Please contact us if you want to use with a radius of curvature near zero.
（※） Please contact us if you require a standard CGH (Computer-Generated Hologram) for aspherical surface measurement.
（※）【About abbreviation】
　　　TS : Transmission Spherical surface
　　　TF :Transmission Flat surface
　　　CON : Convergence, DIV : Divergence, PARA : Parallel
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Polishing Products｜ High precision plane, lens, mirror

We offer high precision planes, lenses and mirrors within λ / 20.
We also offer a variety of custom-made products such as flat and spherical standards for system calibration, so please consult us.

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