Hologram for aiding telescope alignment

An alignment system for aligning a telescope, the alignment system comprising:

• a wavefront sensor configured to produce a beam of light and to receive return light during alignment of the telescope;
• and
• a hologram configured to be positioned in an object space of the telescope and to receive the beam of light from the wavefront sensor, and the alignment system is configured to position at an image plane of the telescope either a system return optic or the wavefront sensor, the hologram comprises multiple patterns comprising:
• a first pattern configured to receive the beam of light from the wavefront sensor and to project a wavefront to a primary mirror of the telescope for aligning the primary mirror with respect to the hologram before a secondary mirror is positioned in the telescope;
• and
• a second pattern configured to receive the beam of light from the wavefront sensor and to project a wavefront to the secondary mirror of the telescope for aligning the secondary mirror with respect to the hologram after the secondary mirror is positioned in the telescope.