Product introduction：
Eachwave can provides various specifications of off - axis parabolic mirrors
√ Use aluminum film substrate reflectors
√ Available at 15°, 30°, 45°, 60° or 90° off-axis
√ Select aluminum, silver and gold film
Different from the standard parabolic mirror, the off-axis parabolic film mirror can direct and focus the incident parallel light at a specific Angle, and support the infinite-distance focus. These mirrors are commonly used as parallel light tubes in Schlieren and MTF systems, while gold-coated off-axis parabolic mirrors are used in FLIR test systems.
Note: Due to the 175Å surface roughness, this MIRROR is not suitable for visible and UV applications that require low scattering.

specification parameter：

Off-axis Angle	15°、30°、45°、60°、90°
Diameter mm	1''、2''、3''、4''
diameter tolerance mm	+0.00/-0.38
EFL  tolerance %	±1
surface topography RMS	1λ
PFL mm	0.5''、1''、1.5''、2''、3''、4''
EFL mm	1''、2''、3''、4''、5''、6''、7''、8''
Degree of surface roughness (Angstroms)	<175 RMS
substrate	aluminum 6061-T6
Coating	Protective gold film/aluminum film
wavelength range um	0.7 - 20

MY508-OAP-508 Drawing for tapering holes

1. The diameter 
An off-axis parabolic metal mirror is usually a prototype, and the diameter is the external dimension. A 1-inch (25.4mm) off-axis mirror is cut from a 1-inch cylindrical metal, and a 2-inch off-axis mirror has a 2-inch (50.4mm) diameter bottom surface.
2. Focal length (female focal length, effective focal length)
The FOCAL length OF AN off-axis parabOLIC MIRROR IS divided into PARENT FOCAL LENGTH and EFFECTIVE FOCAL length. The default focal length is the effective focal length, which is also defined in inches. The focal length of standard off-axis mirrors is 1 inch, 2 inches, 3 inches, 4 inches, and 6 inches.
3. The off-axis Angle
The off-axis Angle is an index reflecting the propagation direction of the beam through the off-axis parabolic mirror. The off-axis Angle of the metal mirror is generally 90°. For the off-axis parabolic mirror with an off-axis Angle of 90°, the propagation axis of the collimated beam should be perpendicular to the base, so as to achieve the ideal focusing effect. Other off-axis angles can also be set if the design is special.
4. The coating
Generally for gold plating film, silver plating film and aluminum plating film. There are also special coatings, such as UV-enhanced aluminum. (as shown in the picture below)
5. Determine whether to drill holes
Off-axis parabolic mirrors with small holes mainly analyze excitation signals (laser or electron beams) and terahertz waves, e.g. 1) where two beams of light are required to travel collinear in space; 2) Where the central beam or electron beam needs to be kept from reflecting. The base of these mirrors has a central hole through which a beam of light can travel collinear with the beam focused by the mirror's parabolic reflection.

Choose coating according to different wavelength

Off-axis parabolic mirror：

Model	Diameter（mm）	EFL（mm）	Off-axis angle	Coating	Price（$）
MY254-OAP-254-Au	25.4	25.4	90°	Protective gold film	220
MY254-OAP-508-Au	25.4	50.8	90°	Protective gold film	220
MY254-OAP-762-Au	25.4	76.2	90°	Protective gold film	220
MY254-OAP-1016-Au	25.4	101.6	90°	Protective gold film	220
MY508-OAP-508-Au	50.8	50.8	90°	Protective gold film	330
MY508-OAP-762-Au	50.8	76.2	90°	Protective gold film	330
MY508-OAP-1016-Au	50.8	101.6	90°	Protective gold film	330
MY508-OAP-1524-Au	50.8	152.4	90°	Protective gold film	330
MY508-OAP-2032-Au	50.8	203.2	90°	Protective gold film	330
MY254-OAP-254-Ag	25.4	25.4	90°	Protective silver film	210
MY254-OAP-508-Ag	25.4	50.8	90°	Protective silver film	210
MY254-OAP-762-Ag	25.4	76.2	90°	Protective silver film	210
MY254-OAP-1016-Ag	25.4	101.6	90°	Protective silver film	210
MY508-OAP-508-Ag	50.8	50.8	90°	Protective silver film	320
MY508-OAP-762-Ag	50.8	76.2	90°	Protective silver film	320
MY508-OAP-1016-Ag	50.8	101.6	90°	Protective silver film	320
MY508-OAP-1524-Ag	50.8	152.4	90°	Protective silver film	320
MY508-OAP-2032-Ag	50.8	203.2	90°	Protective silver film	320
MY254-OAP-254-Al	25.4	25.4	90°	Ultraviolet reinforced aluminum	210
MY254-OAP-508-Al	25.4	50.8	90°	Ultraviolet reinforced aluminum	210
MY254-OAP-762-Al	25.4	76.2	90°	Ultraviolet reinforced aluminum	210
MY254-OAP-1016-Al	25.4	101.6	90°	Ultraviolet reinforced aluminum	210
MY508-OAP-508-Al	50.8	50.8	90°	Ultraviolet reinforced aluminum	320
MY508-OAP-762-Al	50.8	76.2	90°	Ultraviolet reinforced aluminum	320
MY508-OAP-1016-Al	50.8	101.6	90°	Ultraviolet reinforced aluminum	320
MY508-OAP-1524-Al	50.8	154.2	90°	Ultraviolet reinforced aluminum	320
MY508-OAP-2032-Al	50.8	203.2	90°	Ultraviolet reinforced aluminum	320

1，Larger off - axis throwing objective can be customized upon request

2，8mm-3mm conical hole can be punched, the unit price of drilling is $ 20 per piece

The off-axis parabolic mirror is actually photographed