Revenue, Gross Profit, Gross Profit Margin and Operating Income (Loss) by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jul. 02, 2021	Jul. 01, 2022	Jul. 02, 2021
Segment Reporting Information [Line Items]
Revenue	$ 215,356	$ 167,523	$ 419,572	$ 330,107
Gross Profit	$ 95,245	$ 72,406	$ 185,521	$ 141,146
Gross profit margin percentage	44.20%	43.20%	44.20%	42.80%
Operating Income (Loss)	$ 23,291	$ 15,992	$ 47,574	$ 27,091
Operating Segments | Photonics
Segment Reporting Information [Line Items]
Revenue	69,461	62,357	132,243	120,851
Gross Profit	$ 31,182	$ 29,593	$ 59,569	$ 57,702
Gross profit margin percentage	44.90%	47.50%	45.00%	47.70%
Operating Income (Loss)	$ 13,996	$ 14,196	$ 27,431	$ 26,591
Operating Segments | Vision
Segment Reporting Information [Line Items]
Revenue	65,516	63,447	127,566	131,083
Gross Profit	$ 26,535	$ 24,443	$ 51,765	$ 51,369
Gross profit margin percentage	40.50%	38.50%	40.60%	39.20%
Operating Income (Loss)	$ 7,024	$ 3,206	$ 12,066	$ 6,572
Operating Segments | Precision Motion
Segment Reporting Information [Line Items]
Revenue	80,379	41,719	159,763	78,173
Gross Profit	$ 38,864	$ 20,874	$ 77,014	$ 36,951
Gross profit margin percentage	48.40%	50.00%	48.20%	47.30%
Operating Income (Loss)	$ 14,083	$ 12,279	$ 32,421	$ 19,724
Unallocated Corporate and Shared Services
Segment Reporting Information [Line Items]
Gross Profit	(1,336)	(2,504)	(2,827)	(4,876)
Operating Income (Loss)	$ (11,812)	$ (13,689)	$ (24,344)	$ (25,796)